For 17K, SL 27, KM 37, KM 47, and KM 57.
| Part # | Description | Qty. |
|---|---|---|
| DSI 510-450 | Neck Ring O-Ring | 1 |
| DSI 525-716 | Chin Strap Assembly Kit | 1 |
| DSI 530-022 | Screw | 6 |
| DSI 530-024 | Screw | 26 |
| DSI 530-220 | Screw | 2 |
| DSI 530-808 | Pull Strap | 1 |
| DSI 540-105 | Split Ring | 2 |
| DSI 540-115 | Strap Plate | 1 |
| DSI 560-078 | Stepped Neck Dam Ring | 1 |
