Specification:
Item Type: Lens Mount
Head Length: Approx. 50.8mm / 2in, 63.5mm / 2.5in
Mounting Base Size: Approx. 26 x 28mm / 1 x 1.1in
The Difference Between 50.8 and 63.5 Focusing Lens Barrel: The female thread of the lower end of the 50.8 focusing lens barrel is shallow, and the female thread of the lower end of the 63.5 focusing lens barrel is deep.
Lens Diameter: Approx. 20mm / 0.8in

Package List:
1 x Lens Mount

Note:
The reflector frame can be equipped with a 20mm reflecting lens, and the focusing lens barrel can be equipped with a 20mm focusing lens. Check whether the product size is appropriate.