Fixman 85pc O Rings PackRubber O Rings To Create An Air & Watertight Seal Between Materials Or ObjectsSuitable For Sealing Gaps Between Two SurfacesIncludes Assorted Sizes From 4.2 x 7.2mm To 15.4 x 23.8mmHandy Storage Case With CompartmentsMultiple Applications From Plumbing To Watch Repair