NuFletch Ignitor Nocks .233 H Nock Green Pack of 3. Design strengthens the arrow to withstand the punishment of high speed bows. Insert design provides extreme accuracy and precision nock fit. Specifications for NuFletch Ignitor Nocks: Manufacturer: NuFletch Quantity: 3 Package Contents: NuFletch Ignitor Nocks Shot activated Ultra LED is extremely bright. Design strengthens the arrow to withstand the punishment of high speed bows. Insert design provides extreme accuracy and precision nock fit.