Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Fit for Hot Tub Parts:The o-ring 711-4030B 2 inch spa hot tub heater gasket Replace for Gecko, Hydro Quip, Aeware, United, and most other Flow Thu components,For a 2 inch pipeline (the actual measured value of the gasket is 3 inches) Compatible with most spa pump or heater unions gasket,fit for Arctic Spa, Self Flowing Spa, Beachcomber Spa, Bullfrog Spa, for Volcano Spa, California Spa, Canadian Spa Company, Filber Spa, Coleman Spa, Catalina Spa, Jacuzzi, Hot Spring Spa, Marquis Spa, Sweet Water Spa, Thermopa Spa, Unicel Spa, Viking Spa Vita Spa, Waterway Spa, most spa pumps, spa hot tubs or heater joints to prevent leaks. High Quality for Balboa replacement parts: Our replace 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 spa heater union gasket, it's easy to install and saves you valuable time. hot tub heater gaskets usually for a heater to pump connection,Perfectly sealed the leak in the spa. 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.