Fit for Hot Tub Parts: The o-ring 711-4030B 2-inch spa hot tub heater gasket is compatible with Gecko, Hydro Quip, Aeware, United, and most other flow-through components. Designed for a 2-inch pipeline (actual measured gasket size is approximately 3 inches). Compatible with most spa pump or heater unions, suitable for Arctic Spa, Self Flowing Spa, Beachcomber Spa, Bullfrog Spa, 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, and other standard spa pumps, hot tubs, or heater joints to help prevent leaks. High Quality Replacement: This 2-inch spa hot tub heater gasket is made from high-quality, durable rubber material and manufactured to strict quality control standards. Meets or exceeds original part specifications for reliable performance. Easy to Install: Drop-in replacement design for spa heater union gasket allows for quick and simple installation. Ideal for heater to pump connections, providing a secure seal to help prevent leaks. Note: Slight variations in color may occur due to lighting and display differences. This does not affect functionality. Color: As shown in photo Material: Rubber Package Contents: 4 x Spa Hot Tub Heater Gasket Note: Package includes only the items listed above. Other products are not included. Due to lighting and monitor settings, the actual color may vary slightly from the image. Measurement may vary by +/- 1-3 cm.