Kirby Morgan 525-317 Helmet Spares Kit For SL-17A/B Neck Clamp drawing it into the concave

drawing it into the concave edge like an animal's claw

and other key components

The short Clinch strap is used as the top and bottom strap when using 30-40 cubic foot aluminum cylinders only

This Kirby Morgan neck ring assembly comes with a neoprene neck dam and is used in the Kirby Morgan Superlite 27

Kirby Morgan 525-317 Helmet Spares Kit For SL-17A/B Neck Clamp drawing it into the concaveKirby Morgan 525 317 Helmet Spares Kit For SL 17A B. PART NUMBER DESCRIPTION QTY 510 008 O ring 2 510 010 O ring 1 510 211 O ring 1 510 260 O ring 1 510 446 O ring 1 510 481 O ring 1 510 521 Head Cushion 1 510 533 Neck Dam 1 510 550 Oral Nasal Valve 1 510 561 Valve, Water Dump, Black 1 510 575 Nose Block Pad 1 510 747 Oral Nasal Mask 1 515 033 Communications Set 1 525 309 Regulator Rebuild Kit 1 525 311 Side Block Rebuild Kit 1 525 759 Quad Valve