Feature: 1. The guide ring is made of all metal material, the installation screws are smooth and free of jams, long service life, strong and wear‑resistant. 2. Smooth surface, which makes it not easy to leave any mark after scratching. 3. The 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. 4. After 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. 5. This product is made of high quality materials, very durable and sturdy, ready for long term use. Specification: Item Type: Telescope Guiding Scope Ring Color: Black Material: Full Metal Inner Diameter: Approx. 70mm/2.8in Dovetail Plate Size: Approx. 89x30mm/3.5x1.2in Weight: Approx. 218g/7.7oz. Package List: 2 x Guiding Ring6 x Large Screw2 x Small Screw1 x Dovetail Plate Note: 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