Port Orford Cedar Bare wood Arrow Shafts, 5/16" diameter, 30-35# spine weight, 301/2". Federal Excise Tax of 0.48 for each shaft is included in the price of this item. Rose City Archery Premium quality shafting. One Dozen. Prized for strength, straight grain, elasticity and perfect physical weight to spine weight ratio, Port Orford Cedar has no match. Port Orford cedar has been proven and chosen over the decades by folks like Howard Hill, Fred Bear, Ben Pearson and probably you, all of the finest archers in the world, as the best material on the planet for wooden arrows. Port Orford Cedar is what Traditional stands for, something that has been handed down from generation to generation, which has withstood the test of time and endured. Port Orford Cedar is prized for its straightness, strength, beauty and forgiveness in flight over all other woods in the world, no other wood even comes close.