
STI Polycarbonate Cover with Open Base 161x85x76mm – Clear
Key Features
- Clear polycarbonate protective cover with open base design.
- Helps prevent vandalism and accidental activation.
- Hinged lid with stainless steel torsion spring.
- UV stabilised polycarbonate construction.
- Suitable for push buttons, keypads, pull stations and switches.
- Supplied with mounting hardware and gasket.
Specifications
- Item Code: STI6521
- Material: Polycarbonate cover and hinge
- Spring Material: Stainless steel
- Flammability Rating: UL94V-2
- Operating Temperature: −40°C to 121°C
- Compliance: ADA compliant
- Finish: Clear
- Siren / Sounder: No
What's In The Box
- STI6521 polycarbonate protective cover.
- Mounting hardware.
- Installation gasket.
Suitable Uses
- Protection for access control push buttons.
- Covering emergency or shutdown switches.
- Protection for alarm pull stations.
- Shielding keypads, outlets and lighting controls.
Dimensions

| Measurement | Size |
|---|---|
| Height | 161 mm |
| Width | 85 mm |
| Depth | 76 mm |
PDF Resources
Frequently Asked Questions
- What does the open base design mean?
The open base allows the cover to fit over existing wall-mounted devices without needing a full enclosure behind them. - Is the cover suitable for outdoor use?
Yes. The polycarbonate material is UV stabilised for durability in exposed environments. - Does the cover include a sounder or alarm?
No. The STI6521 is a non-alarm protective cover.
Additional Information
- Designed to reduce accidental activation while still allowing easy access when required.
- Polycarbonate construction provides high impact resistance compared with standard plastic covers.
- Gasket helps maintain a clean installation and reduce dust or moisture ingress.