Specifications:
Item Type: Telescope Adapter Ring
Material: Aluminum
Color: Black
Male Thread: M42x0.75
Pitch of Screws: 0.75 mm

Eyepiece Diameter (Optional):
23.2 mm (0.91 inch)
24.5 mm (0.965 inch)
30 mm (1.18 inch)
30.5 mm (1.2 inch)
31.7 mm (1.25 inch)
38 mm (1.496 inch)
42 mm (1.65 inch)
50.8 mm (2 inch)
0.91 inch / 1.18 inch / 1.2 inch suit for microscope
0.965 inch / 1.25 inch / 1.496 inch / 1.65 inch / 2 inch suit for telescope
Note:
1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
2. Please allow slight manual measurement deviation for the data.