The item is designed for M42
Lightweight and
It's very easy to carry and be operated
The rear lens is used when storing your lens or after the lens has been removed from your camera
Screwing the rear lens that keep from your lens mechanism

Specification:

Color: Black
Quantity:1 Pc

Note:
Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
Package includes:
1 X Rear Lens For M42