Description <div style="text-align:justify">These items are LED lighted arrow nocks, which are made of hard and durable ABS material. These kinds of LED arrow can keep luminous over 48 hours. They do not have ON/OFF switch, but they are turned ON/OFF manually. They fit any arrow shaft with the inside diameter of 6.2mm. The batteries inside are not assembled when they are shipped, so the batteries are and battery leakage will not happen. And assembling is very easy, which has been shown in the picture.</div> Feature - Color: Red. - Material: ABS. - Size: About 5 x 0.8 x 0.8cm. - Diameter: For 6.2mm Shaft (Fits any bolt with diameter 6.2mm). - and LED lighted arrow nocks. - Made of hard and durable ABS material, it can keep luminous over 48 hours. - They do not have ON/OFF switch, but they are turned ON/OFF manually. - The batteries inside are and battery leakage will not happen. - Assembling is very easy, which has been shown in the picture.Packing list: 6 x Archery LED Lighted Arrow Hunting Luminous Arrow Tails Bow Accessories Internal Arrow End Fit 6.2mm Arrow Shaft (Blue)