Gold Tip Swift Bolt Shafts 22 in. 1 doz.. Straightness tolerance of +-.005" and weight tolerance of +-2 grains. Available in 20" and 22" lengths. Shafts are 7.3 GPI. Includes brass inserts moon nocks and flat nocks. Specifications for Gold Tip Swift Bolt Shafts: Manufacturer: Gold Tip Color: Black Fabric/Material: Smart Carbon Technology Quantity: 12 Features of Gold Tip Swift Bolt Shafts GPI 7.3 Length: 20" Straightness Tolerance: +/- .5" Outer Diameter: .338" Inner Diameter: .3" Package Contents: Gold Tip Swift Bolt Shafts Half-Moon Nock Flat Nock 11 gr Brass insert Gold Tips most popular bolt choice offers unmatched straightness tolerances and superb accuracy. Straightness tolerance of +-.005 and weight tolerance of +-2 grains. Available in 20 and 22 lengths. Shafts are 7.3 GPI. Includes brass inserts moon nocks and flat nocks.