Nockturnal Shift FIT Lighted Nocks Strobing Red/Blue 3 pk. Super-bright LED illumination;Lithium battery power;Waterproof and shockproof construction;FIT technology, shift fit universal model;Fits X, H, S, and GT arrows;Weight: Approx. 25 gr each;Battery life: More than 20 hours;3 packtable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Second Color: Blue Item Category Code: 1100 Product Group Code: 1100B Product Sub Group 1: 1100B2 Pack Size: 3 Inactive: No