Rear Lens Cap - Arri Bayonet (Arri-B), ABS plastic
This cap is made of very strong ABS plastic to protect mount and rear glass of your lens. It fits Arri-B (Bayonet) lens mount - see picture.
The cap holds firmly on the lens mount due to catching lugs - it will not fall off accidentally. Just put it onto lens mount and turn it clockwise to lock it.
Manufacturer and the cap type are indicated on inner bottom of the cap.
Weight is 17 g.