The Duraflex Hinge Pin O-Ring fits on the slotted groove at each end of the Duraflex Hinge Pin (DF-C203) to keep the Nyliners (Hinge Bushings DF-C209) and Hinge Pin (DF-C203) from working itself out of the Durafirm Hinge.
NOTE: Duraflex boards, stands and parts are NOT for residential use. Duraflex will not sell any boards, stands or parts to residential customers as residential pools are not designed to meet FINA (International Swimming Federation) guidelines.
