Freak Power PWR Barrel Insert Level up your paintball play by having inserts to size to your paint from day to day and am to pm. Having inserts that coordinate with your barrel is the path to success. The Freak insert system has been the standard in the paintball industry for over two decades. They now brings us the new Freak Power inserts. These are compatible with the PWR inserts, fronts and backs that have been recently introduced by numerous other manufacturers. The new Freak POWER inserts offer a better product at a reasonable price. Description: Insert sizes: 678, 680, 682, 684, 686 Type 3 hard coat anodized. Precision machined micro honed mirror finish Aircraft grade 6061-T6 Aluminum Alloy Compatible with Planet Eclipse S63 and Dye UL-I barrels