8 ft, 10 ft, 12 ft Lengths Available 8 ft. Straps Made to Fit All 6-7 ft. Square or Round Spa Tub Covers - (25mm x 243cm) 10 ft. Straps Made to Fit All 8-9 ft. Square or Round Spa Tub Covers - (25mm x 304cm) 12 ft. Straps Made to Fit All 10-11 ft. Square or Round Spa Tub Covers - (25mm x 365cm) Color Black Polyester Webbing Insurance Industry Recommended Product Tested to exceed excessive sustained winds Key Turns 90 degrees to lock, Preventing Unfastening Easy Pinch Release; does not require key to open/unfasten ITW Nexus Plastic Buckle Hardware Lock Assures Product Retains Maximum Wind Resistance High-End Thermoplastic is Safe at Extreme Temperatures and Weather Conditions Keyed Entry Cannot be By-Passed with Simple Tools or Utensils ITW Nexus Superloc Buckle Allows Adjustability and Tightening of Strap Better Than Original OEM in Many Cases Also Available Fixed Length, Without Adjustable Buckle Also offered without stainless screws and without cover corner protector pads Hot tub straps serve a variety of functions. The locking buckles prevent unauthorized spa use and keep covers safely in place during windy conditions. A set of two, straps will adjust to fit spa models.