Fits Boston/Speed Valves. Fill your tow tube up on the way to the lake. No need for your own compressor, just use the service station down the road. Molded base, rubber valve stem.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov