Telescope Finding Scope Mounting Ring Accessories for Astronomical Diameter 90mm

[portable]the guide ring is small in size and easy to carry.it can be put in a backpack or pocket [feature]the width of the guide ring has been widened by 14mm , resulting in more and more stable contact surfaces [easy to install]telescope star finding adapter , adopting bold m6 screws/three locking screws with protective heads to prevent scratches during fixation [anti scratch design]the guide ring has smooth surface , which makes it not easy to leave any mark after scratching [durable material]telescope star finding ring is made of metal , sturdy structure , smooth surface and wear resistant