Starlight Xpress 5-Position SXMDFW-2T MIDI USB Filter Wheel for 2" Filters with Male and Female T-Threads and a Slimline Off-Axis Guider OAG | High Point Scientific
ZWO 7-Position Electronic Filter Wheel for 2-Inch Filters — Starizona
Amazon.com : Astromania 1.25" Multiple 5-Position Filter Wheel for Telescope - with 1.25-Inch Four Color Filters(#15 Deep Yellow, 25 Red, 58A Green and #80A Medium Blue) : Electronics