Description Parallel Shafts Test Kit – Not sure what spine you need? We can help you figure that out with our Parallel Shafts Test Kit. This kit comes with 12 11/32″ port orford cedar shafts in three different spines at full length, approximately 33″. Kits Available Kit 1 includes:  35-40#, 40-45#, and 45-50# Kit 2 includes: 40-45#, 45-50#, and 50-55# Kit 3 includes: 45-50#, 50-55#, and 55-60# Kit 4 includes: 50-55#, 55-60#, and 60-65#