WSR275 Rigid Coupling – 3-part to the product WSR400 / 410 Rigid Coupling to the product WSR400-RF / 410-RF Rigid Coupling – stainless steel version to the product WSR450 / 460 Slotted Coupling to the product WSR450-RF / 460-RF Slotted Coupling – stainless steel version to the product WSR470 / 480 Split Coupling to the product WSR470-RF / 480-RF Split Coupling – stainless steel version to the product