Innovative scuba O-ring kit for the prepared diver when you are scuba diving, you dont want a problem with a tiny little O-ring to ruin your entire day. Prepared divers have one of these handy kits on hand. Packed with 200 o-rings in 18 popular sizes, no one in your party will be left above water. Comes with 200 o-rings, 3 colored picks, and snap-shut carrying case.