Luminous Arrow Nock (manual type) Model:ILNK-001

Size: 5.18/6.2/6.3mm Material: Outer shell is PC and inner core is ABC Battery: CR425 Package: Blister Pack(3 pcs included)Weight: 17.8g/pack Color: Red/Yellow/Green/Blue/PurpleApplication:shaft with ID 5.18/6.2/6.3mm