Specifications: Material: Surgical Plastic Part Number: 6560-857 Barb Fitting: 3/4’’ Weight: 1.6 Ounces Easy to Install Just unscrew the old flow switch and screw in the new one and saved a service call and a cost in the process. Color: Orange Material: Rubber Troubleshooting A defective flow switch will cause a "flashing Flo" or "solid Flo" on the control panel icon. "solid Flo" is the flow switch. "flashing Flo" could be the flow switch, circulation pump (clogged or defective), or dirty filter. Used On The Following Spa Models: All 1-Pump Sundance Spas using the 6500-301 or the 6500-310 Heater Except for 2001+ Capri NOTE: If your flow switch has a barb fitting (3/8") off the bottom of the Tee then you need to order the 6560-860 Flow Switch. Package Includes: 1 x Flow Switch