Made from a heat resistant, high impact material (PC 2805) this simple and effective signalling device is a must have item for all Fenix torch owners. Easy to fit and remove. Compatible with Fenix LD and PD-Series Flashlights. Made from PC 2805 plastic created by Bayer Material Science AG, high quality guarantee. Anti-impact and anti-heat, super durable, can be used in bulletproof applications. 21.5 mm. Easy to attach, easy to remove.