# SRPP (Glass-Filled Polypropylene)

SRPP is a **glass-filled polypropylene sheet material** commonly used in FRC, often supplied or popularized through vendors like West Coast Products.

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</div>## What It Is

SRPP is a reinforced plastic made from:

- Polypropylene base material
- Glass fiber reinforcement

This combination makes it significantly stronger and stiffer than standard plastic sheet.

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</div>## Why FRC Teams Use SRPP

SRPP is used because it:

- Is lightweight compared to aluminum
- Has good stiffness for a plastic material
- Is impact resistant and durable
- Does not crack as easily as brittle plastics
- Is easy to cut and machine

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</div>## Common Applications

- Robot structural plates
- Mounting plates and brackets
- Intake side plates
- Lightweight gearbox or mechanism plates
- Non-metal structural components

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</div>## Manufacturing Notes

- Don't cut it with the CNC, use the laser cutter instead.
- Drills cleanly with proper speed and sharp bits if you heat up the edges with the flamethrower afterwards.
- Works well with bolts and rivets if you use large washers

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</div>## Limitations

- Not as strong as aluminum in high-load structural areas
- Can flex under heavy drivetrain loads
- Edge quality matters for strength (avoid rough cuts)

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</div>## Key Idea

SRPP is a lightweight, glass-filled plastic sheet material used in FRC as a strong alternative to aluminum plates in lower-to-medium load applications, especially where weight savings matter.