Do you like speed? How about super tight weight and straightness tolerances? Ultralight Pro Series shafts are ultra-light and ultra-fast with the same tight tolerances you have come to expect from any Gold Tip Pro Series arrow. Available in four spine sizes from 600 up to 300, the options for use with this shaft are virtually limitless. From domination on the 3-D course to 1400+ FITA scores, this shaft will not disappoint. Technical specifications: Material Carbon Straightness Tolerance: 0.001 Weight Tolerance: +/- 0.5 gr Available Spines: 300, 340, 400, 500, 600 and 700 Uncut Length: 32" Designed for: Traditional Archery, Field, 3D and Hunting Spine Grains/inch Outside Diameter 300 8.8 0.299 inches 340 8.2 0.296 inches 400 7.4 0.291 inches 500 6.3 0.285 inches 600 5.9 0.283 inches 700 5.4 0.280 inches