The filter slide is a 4 position unit with 3 threaded places for 2" filters and one over sized clear hole position. It is machined from 6061 aluminum and has a nice matte black anodized finish. Features a positive click stop and removable slide unit for storing the whole slide unit with filters installed in your EP case when not in use.
The unit is intended to be mounted in larger open tube scopes and bolts up to MoonLite focusers bolt pattern and other non MoonLite brand focusers. Photo below showes 31 nagler/parracor combo in a dual rate CR2 focuser mounted on a 1" spacer. The bolts go right through and thread into the filter holder. The best visual setup today--
See URL above to order on-line.