Flex Fletch LIT Lighted Nocks .204 Blue 3 pack 1006308. 204 ID carbon shafts ensure reliable tracking in low-light conditions. This 3-pack of blue lighted nocks features an external on/off switch for hassle-free operation an auto-on design that activates upon arrow release and a battery life of up to 48 hours. Weighing just 18 grains these cost-effective nocks are engineered to help preserve your arrows while offering standout performance. Specifications for Flex Fletch LIT Lighted Nocks 1006308: Manufacturer: Flex Fletch Color: Blue Size: 0.204 Features of Flex Fletch LIT Lighted Nocks: Fits carbon shafts with 0.204" inner diameter Super bright blue light for day and night visibility External on/off switch ? no tools needed Auto-on activation when shot Up to 48 hours of continuous illumination Weight: 18 grains Includes 3 lighted nocks per pack Cost-effective solution for reducing lost arrows Package Contents: Flex Fletch LIT Lighted Nocks