If you work on dive gear you know the importance of having the correct O-rings. Many of the O-rings used on cylinders, valves and regulator hoses are pretty much generic. Having a large selection of common O-rings is a must for the serious repair technician. All Innovative shop O-ring kits now come with 3 multi-use brass picks included! Buna Rubber O-ring Kit: 200 pieces of 18 most popular sizes! Kit comes in a top load sectioned (with Labeled Cover) plastic box for organizing all the different size O-rings.