This rubber eyecup guard have an inner diameter of 42mm .
Eyecup from SNYPEX OPTICS is an accessory designed to deliver a comfortable viewing experience for eyeglass and sunglass-wearers. The eyecup is made of rubber and attaches to the eyepiece of SNYPEX- 42mm Eye series binoculars.
Made for 10x42 mm & 8X42 mm SNYPEX Knight ED & D-ED Binoculars.
Also will Fit SNYPEX 8X42 mm SNYPEX Profinder HD Binocular.