The Twist-In Eyecup from Swarovski is a replacement for the eyecups that come on the 10x42 EL Range binocular. This is an original part replacement if you want a back-up, or lose or break one of the original eyecups.
Made to fit only the Range 10x42 EL Range binocular
In the Box
Swarovski One Twist-In Eyecup for Range 10x42 EL Range Binocular