Kirby Morgan Old School Helmet Waffle Beanie (Charcoal) Spare Parts 530 019 Screw 2 510 007 O ring 515 061 530 019 Screw 2 510 007 O ring 2 530 032 Screw 3 510 033 O ring 1 560 530 Water Dump Adapter Cover 1 520 042 Tie Wrap 2 510 786 Starboard Whisker 1 520 118 Clamp 2 530 009 Brass Nut 2 510 776 Exhaust Valve 2 520 200 Valve Seat 2 510 760 Quad Valve Exhaust The Sub Aspida can be supplied as an O2 only version making it perfect for Air Diving systems The comfort and versatility of Kirby Morgan's Waffle Knit Old School Helmet Beanie make it an instant classic The Old School Helmet patch is embellished on the brim to cap it off perfectly