Sealed Strength for Heavy-Duty FishingThe PENN Slammer IV is packed with advanced features built around a proven IPX6 sealed body and spool. Its redesigned Slammer drag system offers improved sealing a wider range of usable drag and bearing support for added smoothness. With all brass CNC gear technology an 8 plus 1 stainless steel bearing system and a Hydrophobic Line Roller Bearing this reel is built to be a true workhorse. IPX6 sealed body and spool Redesigned sealed Slammer drag system Wider usable drag range All brass CNC gear technology 8 plus 1 stainless steel bearings