---
type: product
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stock_number: "82912-11"
canonical_url: "https://www.artisantg.com/Scientific/82912-11/OPTO-Engineering-285-Protective-Cap"
json_url: "https://www.artisantg.com/Scientific/82912-11/OPTO-Engineering-285-Protective-Cap.json"
generated_at: "2026-11-07T02:06:13.791Z"
last_updated: "2026-10-02T05:35:40.273-05:00"
---

# OPTO Engineering 285 Protective Cap

_Summary and Categories are this item's record. The description sections and FAQ are machine-assisted and can contain errors; where they disagree with the record, the record is correct, and where description sections disagree with each other, Details wins._

## Summary

- Manufacturer: OPTO Engineering
- Model: 285
- Condition: Used and in Excellent Condition
- Price: $45.00 USD
- Availability: In stock, 1 available
- Warranty: 1-Year Warranty with 30-Day Return Guarantee
- ITAR restricted: No
- Shipping weight: 0.5 lb, estimated
- Shipping dimensions: 8X8X3 in, estimated

## Categories

- Lab & Analytical > Lab Parts (primary)

## Details

Configurations: **
- Thickness: 8 mm
- Inside Diameter: 1 2/16 Inches

## Images

- <https://www.artisantg.com/itemimages/opto_engineering_285_view1_2023111104424.jpg>
- <https://www.artisantg.com/itemimages/opto_engineering_285_view2_2023111104424.jpg>