Delrin roundwith O-ring, suitable for Timoklick. Products nameVersionmaterialØcontentsitem No.pressure piecesflat + concaveDelrin22-34mm8 pieces509060pressure piecesflat + concave *** Big-Size ***Delrin46-60mm5 pieces509059pressure piecesflat, concave + deep cut outDelrin15-40mm10 pieces509058O-ringsfor Delrin pressure piecesrubber5 pieces509057