Telescope Finding Scope Mounting Ring Accessories for Astronomical Diameter 90 mm

[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 [portable]the guide ring is small in size and easy to carry.it can be put in a backpack or pocket [durable material]telescope star finding ring is made of metal, sturdy structure, smooth surface and wear resistant [anti scratch design]the guide ring has smooth surface, which makes it not easy to leave any mark after scratching