Red LED Luminous Nock with Switch 7.62mm Inner Diameter Card String Automatically Lights Up the Crossbow Nock

Usage: the tail of the arrow does not need to be lit in advance and the string will light up automatically at the moment of out. Designed for greater efficiency in low light enhanced precision and vastly improved retrieval Help you take aim at improving your archery accuracy Flashing high-visibility light makes it easier for you to find your arrow Work for: Aluminum arrow shafts & carbon arrow shafts & glassfiber arrow shafts colour:Red Material:PC size:Inner diameter 7.62mm Package Contents: 3 x LED illuminated nock Only the above package content other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.