Kirby Morgan 525-378 Helmet Spares Kit For KM-77 Underwater Grinder and a series of threaded

and a series of threaded stainless steel anchors for a versatile four-position titanium pocket clip

Chain Speed @ 12 GPM: 2591’ per min / 13

The Swirl-Off quick change tungsten carbide cutters are the replacement cutters for the 50671 Swirl-Off Barnacle Buster

The major difference between the 18 and 28 is the material of the mask frame

Kirby Morgan 525-378 Helmet Spares Kit For KM-77 Underwater Grinder and a series of threadedKirby Morgan 525 378 Helmet Spares Kit For KM 77. PART # DESCRIPTION QTY. 330 030 Screw 1 330 035 Washer 1 510 008 O ring 2 510 010 O ring 1 510 029 O ring 2 510 260 O ring, View Port 1 510 450 O ring, Neck Ring 1 510 481 O ring 2 510 550 Valve, Oral Nasal 1 510 575 Pad, Nose Block 1 510 628 Neck Dam, Neoprene (Medium) 1 510 683 Chin Cushion 1 510 743 Oral Nasal Mask 1 510 754 Head Cushion Assembly 1 510 776 Exhaust Valve 2 515 033 Communication Set 1