1-3/8" Diameter AXLE, CHROME-MOLY (4130) STEEL TUBE, 44" LENGTH, 1-3/8" OD, .225 WALL, 2 OFFSET 1/4" KEYWAYS Centerless ground for a true surface. Two keyways each running half the length of the axle are offset 180 degrees and stop 1/4" before the snap ring grooves at each end. Zinc plated and poly-wrapped for protection. Snap rings included. Strong & lightweight.