12pcs 4.2mm Archery Arrow Nocks For Carbon/Fiberglass/Aluminum Arrow Shafts
Fit for Inner diameter 4.2mm arrow shafts.
Outer Diameter: 4.2mm
Inner length: 15mm
Weight: 0.35g / piece
Lighted Colour: Blue/yellow/red/orange
Easy to turn On and off and they fly exactly like a standard arrow nock.
Package: 12/50/100pcs nocks