Feature 1Compatibility: The arrows lighted nocks is suitable for the shaft with an inner diameter of 6.2mm, which can meet the needs of people 2Plastic Material: The shell is made of hard plastic material, strong and durable, hard texture, not easy to damage, long service life 3Simple Operation: The arrows lighted nocks are simple, easy to understand, without the aid of tools, clamping shaft can be used 4Automatic Lighting: The tail of the luminous arrow can be automatically lit and manually closed. The light is stable and the LED lamp has a long service life 5Excellent Accessory: The arrows lighted nocks can help us see the path of the arrow clearly at night, so that we can quickly locate, is a practical accessoryItem Type: Lighted Nocks for ArrowsProduct Material: PEWeight: Approx. 19g / 0.7ozLength: 4.5cm / 1.8inBattery: Built In Button BatteryModel Number: SR416SWCapacity: 8mah .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List3 x Lighted Nocks for Arrows