The DoubleTake Ultra Bright Halo Micro Nock Blue is a reliable and dependable choice for rimfire enthusiasts. Its compact design fits micro arrow IDs of .165"-.166", making it suitable for various applications. The bright blue color provides excellent visibility, even in low-light conditions. Fast shipping ensures that you can get started with your shooting sessions quickly. This product boasts internal components designed for dependability and bowstring-activated performance. Its patent-pending design prevents accidental activation when placing on the bowstring. With its superior performance and dependable nature, the DoubleTake Ultra Bright Halo Micro Nock Blue is an excellent addition to any rimfire setup.Key Benefits and Features: Color: Blue MICRO- Fits micro arrow IDs of .165"-.166"