Sciencetech FW-8 filter wheel has eight filter positions. Each filter position accepts 1” diameter round filters up to 5mm thick. The filter wheel is a compact pancake design. Please note that individual filters are also sold separately.

Supports 1" or 25mm diameter filters
The 1" diameter slots of the filter-wheel can also hold 25mm diameter filters since 25mm is slightly smaller than 1" (25.4mm). The filters are held in place by a top retaining ring which presses down onto the edge of the filter and works whether they are 1" or 25mm diameter. Due to the retaining ring, the clear aperture is reduced to 23mm diameter.

Technical Specifications
Filter Sizes: 1” or 25mm diameter, up to 5mm thick (sold separately)
Clear Aperture: 23mm
Diameter: 139.7 mm (5.5")
Thickness 25.4 mm (1")
Center of Beam Light: 76.2mm (3")