1The guide ring is made of all metal material, the installation screws are smooth and free of jams, long service life, strong and wearresistant. 2Smooth surface, which makes it not easy to leave any mark after scratching. 3The guide ring is small in size and easy to carry. It can be put in a backpack or pocket, and can be used after installation. 4After installation, the equipment is stabilized, and it is not easy to shake, so that the observation scene is clearer and clearer, and the best effect is achieved. 5This product is made of high quality materials, very durable and sturdy, ready for long term use. Item Type: Telescope Guiding Scope RingColor: Black Material: Full Metal Inner Diameter: Approx. 70mm/2.8in Dovetail Plate Size: Approx. 89x30mm/3.5x1.2in Weight: Approx. 218g/7.7oz 2 x Guiding Ring 6 x Large Screw 2 x Small Screw 1 x Dovetail Plate 1: Do not place the item high, to avoid damage caused by falling2: The torque of the installation screw should not be too large to prevent damage to the screw hole