1. W2370A is multi-funtion dovetail slot, the width of the internal slot is 5.1mm, it can be fixed with M3-M5 screw
2. It can be installed to: SVBONY SV48, SV48P, SV503 70/80/102ED, Celestron C8, C8HD, C925, C11HD, SKYRVER: 80ED, 102ED, 130APO, SKYRVER 100ED binoculars, and other primary mirror