Trusted Indian Manufacturer

PP Injection Moulded Caps Manufacturer in India

As a trusted PP injection moulded caps manufacturer in India with over 35 years of experience in the industry, we deliver durable, precision-engineered closures designed for rigorous laboratory and industrial packaging applications.

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Precision Molded

Leak-Proof Sealing

Multiple Sizes

Competitive Pricing

Our Product Range

Polypropylene Caps for Laboratory Packaging

Standard Screw Cap (SPI 1-A)

Specs and Sizes: Designed with a 44.5 mm inner diameter, 50 mm outer diameter, and a height of 17 mm, this standard screw cap is built for secure sealing. Molded from pure polypropylene (PP) with a unit weight of 7.2 grams, it follows the SPI 1-A configuration.

32 MM Cap (SPI 1-B)

Details: Built to an inner diameter of 33 mm, outer diameter of 37 mm, and height of 18.8 mm. This 4.5-gram polypropylene cap provides a reliable closure for standard laboratory and industrial container setups.

Open Ring PP Cap (SPI 2-A)

Dimensions: Features an inner diameter of 17 mm, outer diameter of 20 mm, and a compact height of 11.5 mm. Engineered with a lightweight 0.8-gram polypropylene build for specific testing assemblies.

Solid Top Screw Cap (SPI 2-B)

Overview: Manufactured with an inner diameter of 16.5 mm, outer diameter of 19 mm, and height of 13.2 mm. Weighing just 0.9 grams, this solid top screw cap offers leak-proof containment.

25 MM Flip Top Cap (SPI 8-A)

Design: Engineered with a 25 mm inner diameter, 27.5 mm outer diameter, and 26 mm height. Crafted from polypropylene at 3.5 grams, it provides easy opening and reliable resealing for liquid dispensing bottles.

SPI 1 Series

PP Screw Cap - Standard Series

Our standard screw cap series provides reliable sealing solutions for various laboratory and industrial packaging applications with precision-engineered dimensions.

Code	Description	Size	Material	Weight
SPI 1-A	Standard Screw Cap	ID44.5 X OD 50 X17	PP	7.2 GRM
SPI 1-B	32 MM CAP	ID33 X OD 37 X18.8	PP	4.5 GRM
SPI 1-C	17 MM CAP	ID19 X OD 22.5 X17	PP	2.1 GRM
SPI 1-D	16 MM CAP	ID17 X OD 20 X14.3	PP	1.1 GRM
SPI 1-E	19 MM CAP	ID21 X OD 23 X 9.4	PP	0.80 GRM
SPI 1-F	16 MM CAP	ID18 X OD 21.6 X14.0	PP	1.5 GRM
SPI 1-G	18 MM CAP	ID19 X OD 21.5 X16.4	PP	1.8 GRM

SPI 2 Series

PP Screw Cap - Ring & Solid Top Series

This series combines open ring and solid top designs, providing versatile sealing options for various laboratory container types and diagnostic packaging needs.

Code	Description	Size	Material	Weight
SPI 2-A	Open Ring PP Cap	ID17 X OD 20 X11.5	PP	0.8 GRM
SPI 2-B	Solid Top Screw Cap	ID16.5 X OD 19 X13.2	PP	0.9 GRM
SPI 2-C	Open Ring PP Cap	ID13.7 X OD 16.3 X11	PP	0.5 GRM
SPI 2-D	Solid Top Screw Cap	ID18 X OD 21.8 X14	PP	1.5 GRM

SPI 3 Series

PP Screw Cap - Wide Flat & Solid Top Series

Designed for larger containers and industrial applications, this series features wide flat caps and solid top configurations for secure containment.

Code	Description	Size	Material	Weight
SPI 3-A	Wide Flat Cap	OD 63 X37.3	PP	12.0 GRM
SPI 3-B	Solid Top Screw Cap	OD 60.5 X25	PP	8.5 GRM
SPI 3-C	Solid Top Screw Cap	OD 41.0 X15	PP	3.1 GRM
SPI 3-D	Solid Top Screw Cap	OD 45.7 X16.0	PP	3.7 GRM
SPI 3-E	Step Down Screw Cap	OD 40.7 X20.0	PP	5.0 GRM

SPI 6 Series

HDPE Lids & Plugs - Closure Solutions

Our HDPE lid and plug collection provides specialized closure solutions for various container sizes and diagnostic packaging configurations.

Code	Description	Size	Material	Weight
SPI 6-A	32 MM Lid	OD34.0 X ID 30.2 X18	H.D.P.E	1.9 GRM
SPI 6-B	47 MM Lid	OD53.3 X ID 44.5 X10.5	H.D.P.E	4.4 GRM
SPI 6-C	8MM Plug	OD10.5 X ID 6.0 X8.0	H.D.P.E	0.25 GRM
SPI 6-D	11 MM Plug	OD13.0 X ID 8.7 X10.2	H.D.P.E	0.4 GRM

SPI 8 Series

Flip Top Cap - Dispensing Solutions

Our flip top cap series offers convenient dispensing solutions for liquid bottles with easy-open and reliable resealing functionality.

Code	Description	Size	Material	Weight
SPI 8-A	25 MM Flip Top Cap	ID25 X OD 27.5 X26	PP	3.5 GRM
SPI 8-B	28 MM Flip Top Cap	ID28 X OD 30.0 X24.5	PP	4.0 GRM
SPI 8-C	10 MM Blue Cap	ID12 X OD 16 X15.8	PP	0.9 GRM
SPI 8-D	22DIA Screw Cap	ID25 X OD 29.5 X17	PP	2.6 GRM
SPI 8-E	25MM Screw Cap	ID27.5 X OD 35.0 X18	PP	3.3 GRM
SPI 8-F	20MM Screw Cap	ID21 X OD 25.0 X15	PP	1.9 GRM
SPI 8-G	10MM Open Ring	ID10.5 X OD 14.0 X10	PP	0.5 GRM
SPI 8-H	22MM Seal Cap	ID25.0 X OD 28.0 X27	PP	3.5 GRM

SPI 9 Series

PP Screw Cap - Precision Series

Our precision series includes specialized screw caps and dropper caps designed for specific laboratory and pharmaceutical packaging requirements.

Code	Description	Size	Material	Weight
SPI 9-A	20 MM Screw Cap	ID22 X OD 25.0 X15	PP	1.9 GRM
SPI 9-B	15 MM Dropper Cap	ID16 X OD 19.5 X11.5	PP	0.9 GRM
SPI 9-C	15 MM Screw Cap	ID16 X OD 19 X13.0	PP	0.8 GRM
SPI 9-D	12MM Screw Cap	ID14 X OD 16 X11	PP	0.6 GRM
SPI 9-E	15MM Screw Cap	ID16 X OD 19.0 X13	PP	0.8 GRM

Why Partner With Us

Why Partner with Sai Prasad

Decades of Manufacturing Mastery

Backed by over 35 years of dedicated industry experience, Sai Prasad brings unmatched expertise and technical precision to every production batch.

Strict Quality Control

We utilize high-grade virgin polymers and advanced injection molding techniques to maintain strict dimensional accuracy across all cap sizes.

Reliable B2B Execution

As an established direct manufacturer, we provide consistent supply chain support, scalable production runs, and custom solutions tailored to your specific diagnostic and pharmaceutical packaging needs.

Custom Manufacturing

Bulk Orders and Custom Solutions

How We Supply Packaging Caps for Diagnostic and Pharma Use: As a dedicated manufacturing unit, we produce industrial-grade polypropylene caps tailored to fit standard diagnostic bottles, reagent containers, and laboratory packaging lines securely.

Talk to Our Team for Bulk Requirements: Reach out to discuss your volume requirements, custom tooling options, or specific size variations needed for your industrial product lines.

Our Manufacturing Capabilities

Bulk volume production with competitive factory pricing
Custom mold design and tool development
Color matching and material specifications
Reliable on-time delivery across India

Contact Our Manufacturing Team

Ready to Partner with Sai Prasad?

Direct factory supply of precision-engineered PP caps for diagnostic, pharmaceutical, and laboratory packaging with reliable bulk production and custom tooling support.

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