Home » Kirby Morgan One Way Valve Kit for all KM Dive Helmets Kirby Morgan One Way Valve Kit for all KM Dive Helmets SKU: 525-330 More Views Kirby Morgan One Way Valve Kit for all KM Dive Helmets SKU: 525-330 One Way Valve Kit for all Kirby Morgan Dive Helmets Be the first to review this product Qty: Add to Quote Add Wishlist Add Compare Download Product Datasheet Description Specification One Way Valve Kit for all Kirby Morgan Dive Helmets. Each Kit comes with the following parts and quantities listed below:PART , DESCRIPTION QTY510-483 O-Ring 1510-491 O-Ring 1510-492 O-Ring 1520-028 Wiper 1535-920 One Way Valve Spring 1