OG Gift Card Add On this hard eyecup offers an

this hard eyecup offers an enhanced ergonomic design that clips securely into the existing location on your Mark 4 spotting scope

Make the switch today and experience the difference

securely locking into place so you can enjoy a hassle-free viewing experience

Required Items for a complete system:

this eyecup offers superior comfort and stability

OG Gift Card Add On this hard eyecup offers anGive the gift of On Glass. Perfect for the hunter, birder, or backcountry photographer in your life. Please note: this is a digital gift card. It will not be physically mailed it will be delivered via email to the recipient with a unique code to use at checkout.