Please note: slight color differences or variations in the physical product do not affect usage. Thank you for your understanding. This o-ring 711-4030B 2 inch spa hot tub heater gasket is a replacement for Gecko, Hydro Quip, Aeware, United, and most other Flow Through components. It fits 2 inch pipelines (the actual measured value of the gasket is 3 inches) and is compatible with most spa pump or heater unions gasket. Fits Arctic Spa, Self Flowing Spa, Beachcomber Spa, Bullfrog Spa, Volcano Spa, California Spa, Canadian Spa Company, Filbur Spa, Coleman Spa, Catalina Spa, Jacuzzi, Hot Spring Spa, Marquis Spa, Sweet Water Spa, Thermospa Spa, Unicel Spa, Viking Spa, Vita Spa, Waterway Spa, and most spa pumps, spa hot tubs, or heater joints to prevent leaks. High quality replacement parts: Our replacement for Balboa 2 inch spa hot tub heater gasket is made from high-quality, durable materials and manufactured to strict quality control standards that meet or exceed OEM specifications. Easy to install: A drop-in replacement for spa heater union gasket, it's easy to install and saves valuable time. Hot tub heater gaskets are typically used for heater to pump connections, providing a perfect seal against leaks. Material: Rubber Color: As shown Package Contents: 6 x Spa Hot Tub Heater Gasket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement allows an error of +/- 1-3cm.