Zeiss Sports Optics Victory FL/RF/HT and Conquest HD Adapter For 3x12 Mono Tripler 32mm and 42mm This adapter allows ZEISS Victory FL series binoculars to be used with the 3x12B Classic monocular, which will triple the effective magnification. In order to use the Mono 3x12 T* as a booster for your binoculars you need to fix it on with an adaptor. When you place your order simply specify which binoculars you want to use the Mono with. You will then be sent the correct adaptor. It fits with the Victory and Conquest binoculars of 30 mm lens diameter and the classic Dialyt.