Air Bulb & Hose Assembly fits Ridgid, Spartan, General, and many other drain cleaning machines that use air as an actuator - 3/8" x 8' long semi-flexible neoprene hose - Heavy-duty neck on the bulb with a fitted barbed hose fitting insert. - A riveted aluminum plate is on the bottom of the foot pedal for added stability, which is also branded with our logo and part number. ** Note: The 8' long neoprene hose is long-lasting and semi-flexible ** The hose O.D. (outside diameter) is 3/8" and the I.D. (inside diameter) is 3/16" ** Packaging includes a mini hose clamp if needed to make a tight seal when installing the neoprene air hose end to your machine's existing air switch connection. (on most applications the mini hose clamp is not needed). ** This foot pedal works well with our brand of air switch by Drainage Solutions LLC and with most brands of drain cleaning machines that use air as an actuator. ** Have tried and tested on our personal Ridgid and Spartan machines. ** Brand: Drainage Solutions LLC. - Part# DS105-A by Drainage Solutions LLC. Our foot pedal will fit Ridgid K-400 and K-380 machines. Note: Neoprene hose is identified and measured by the inside diameter and wall thickness. (Hose size: 3/8" O.D. 3/16" I.D. 3/32" Wall).