Wicked Ridge Match 400 Alpha-Nock HP Carbon Arrow .004in 20in Pack of 6 Black. Each Match 400 carbon crossbow arrow is inspected for straightness to within .004''. The arrow is equipped with TenPoint's Alpha-Nock HP. TenPoint's Alpha-Nock features a deep bowstring groove a large smooth radius base and elongated ears. The string on TenPoint?s crossbows wraps tightly around the center of the Alpha-Nock to yield straight nock travel and precision down-range accuracy while minimizing string serving wear. The Alpha-Nock?s deep groove ''holds'' the bowstring in place on extremely narrow crossbows to prevent ?shoot-over? or ''shoot-under''. The 20-inch carbon shaft is fletched slightly offset and is fitted with a 61-grain aluminum insert and 3.5'' Bohning X Vanes. Specifications for Wicked Ridge Match 400 Alpha-Nock Carbon Arrows: Manufacturer: Wicked Ridge Color: Black Length: 20 in Weight: 400 grain Nock Type: Alpha-Nock HP Fabric/Material: Carbon Archery Application: Hunting Features of Wicked Ridge Match 400 Alpha-Nock Carbon Arrows: Weighs: 400gr Straightness .004" 20" 3 pack Package Contents: Wicked Ridge Match 400 Alpha-Nock Carbon Arrows Wicked Ridge HEA-760.6: Match 400 Alpha-Nock HP Carbon Arrow .004in 20in Pack of 6 Black