Features 1、Made of high quality plastic material, this archery arrow nock is rather sturdy and durable. 2、Fits any bolt with inside diameter 6.2mm and 6.25mm. 3、No need to turn on the light in advance, the LED light will be lit automatically at the moment the arrow is fired out. 4、When you don't need to use it, you can turn off the LED light by hand. 5、Lightweight and small size, easy to carry and store. If you are a archery enthusiast, you may like this archery arrow nock. It is soft, sturdy, wearable and durable. And you can adjust the size and position of the string by yourself. It will be a great choice for you. Features: Made of high quality plastic material, this archery arrow nock is rather sturdy and durable. Fits any bolt with inside diameter 6.2mm and 6.25mm. No need to turn on the light in advance, the LED light will be lit automatically at the moment the arrow is fired out. When you don't need to use it, you can turn off the LED light by hand. Lightweight and small size, easy to carry and store. Specification: Condition: 100% Brand New Item Type: Arrow Nock Material: Plastic Size: 4.6 * 0.6cm / 1.8 * 0.2inch Weight: Approx. 19g / 0.7oz Package List: 3 * Arrow Nock Package List