This product was created by AIM O, a trustworthy brand that specializes in producing tactical sights and scope accessories.
The item is a universal protector for the red dot and optical sights. It has two interchangeable polycarbonate glasses - transparent and yellow. The mount is machined from metal alloy and is compatible with Picatinny rails. It protects against BB impacts and is attached in front of the aiming device. 

Weight: 43 g 

Aim-O is one of the most reliable optics manufacturer for airsoft guns. The wide offer among the others includes: red dots, prismatic/variable/sniper scopes, optic mounts, and risers. Attention to detail, modern designs and great quality control guarantee that AIM-O products will not let you down on the airsoft battlefield.