Dye UL-I PWR Barrel InsertThis is the Dye UL I Barrel Insert only. You will need three pieces in total to make a complete Dye UL I barrel. #1 The Dye UL I barrel back, #2 The Dye UL I barrel tip, #3 The Dye UL I insert (or a PWR compatible insert). You can choose from many different inner bore sizes to suit the paintball size you have. Most players will have several of these inserts on hand since paintballs can vary in size. Accuracy DYE versified. The new DYE UL I Barrel