Extension Tube for 1.25" Telescope Eyepiece or filter
Made of aluminum, anodized black
This 1.25" extension tube add a little length to the light path on your telescope, and provides extra focuser "back travel" that is often needed for short-range terrestrial viewing
Brass compression ring design hold your eyepieces or accessories securely
Thread pitch: M28.5*0.6 (for Standard 1.25 inch Filter)