Made specifically for the recurve indoor archer with a stiffer middle section and weaker ends to provide proper flex to achieve the ideal fletching clearance around the cushion plunger and arrow rest. This allows for more consistency and increased accuracy. Features BuffTuff construction for extreme durability to withstand the hardest targets. Straightness tolerance: +-.0025, Weight tolerance: +- 1 gr. Available in sizes 420 (7.3 GPI), 500 (6.6 GPI), 580 (5.6 GPI), and 650 (5.3 GPI). All components sold separately.