Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Fit for Parts:The o-ring 711-4030B 2 inch spa 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 Spa, Self Flowing Spa, Beachcomber Spa, Spa, for Volcano Spa, Spa, Company, Filber Spa, Spa, Spa, , Spa, Marquis Spa, Sweet Water Spa, Thermopa Spa, Spa, Viking Spa Vita Spa, Waterway Spa, most spa pumps, spa or heater joints to prevent leaks. High Quality for replacement parts: Our replace for 2 inch spa heater gasket is made from high-quality, materials and manufactured to quality control standards that meet or exceed specifications. Easy to Install: A drop-in replacement for spa spa heater union gasket, it's easy to install and saves you valuable time. 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 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.