Ermes roller speargun muzzle with ceramic bearings. Small, light, entirely CNC built from extremely durable impact resistant Delrin. The 28 mm pulleys are protected by a fairing and use high-speed ceramic bearings. Shooting line can be routed to the right or left side. Bungee anchoring point/reel line guide/2nd wrap line guide are built in. For speargun barrels with 26mm or 26.5mm inner diameter. Includes two incorporated O-rings to prevent water intrusion into the tube. Peg insert diameter is 26mm with sacrificial stripes that increase the diameter to 26.5mm. These stripes can be easily cut or sanded off, allowing compatibility with 26mm and 26.5mm inner diameter aluminum and carbon speargun tubes. Muzzle material can be filed or sanded reducing the peg diameter, making it possible to fit many tube configurations.