The new Nano SST shafts are designed for the use with the recurve bow and feature different spines along the length, with lower spine values in the front and back ends, with the weaker spine in tail for a perfect clearance.
These shafts are produced with a 30-ton carbon to get resistance, consistency and accuracy on the target.
Reduced diameter to reduce cross-wind drift.
Every set is selected in spine and weight.
Straightness: +/-.002”
Weight tolerance: +/-1.0 grains
Spine tolerance: +/- .002”

Shaft / Spine / Grains Per Inch / Outer Diameter / Shaft Length / Inner Diameter
 650     .650"             6.95                   .209"                   31"                 .144"
 550     .550"             7.79                   .215"                   32"                 .144"
 500     .500"             8.18                   .219"                   32"                 .144"