TenPoint Crossbows 2219 Aluminum Omni-Brite 2.0 Receiver for Crossbow Arrow Nock, .305" inside diameter, Orange (6 Pack) (HEA-347.6) TenPoint Omni-Brite 2.0 receivers for Pro Elite Arrows; receiver color is yellow; package of 6 receivers and 1 alignment tool; will fit any shaft with a .305 inside diameter NOT COMPATABLE WITH ORIGINAL OMNI-BRITE CAPS, FOR OMNI-BRITE 2.0 ONLY Build your own Omni-Brite 2.0 lighted arrows- Just purchase these receivers, the Omni-Brite 2.0 clear caps (HEA-342.6), and Omni-Brite lite sticks! Omni-Nock design features SIX MICRO GROOVES that form three bowstringchannels which ELIMINATE THE INDEXING PROBLEM associated with moon andcapture nocks Channel "holds" the bowstring in place, the Omni-Nock also prevents flat-nock "shoot-over" or "shoot-under", a growing problem with today's narrow crossbows with acute string angles