2-1/4"-dia. neoprene inner tube with tough nylon cover helps seat beadby compressing tread to expand bead. For passenger, small ag andlight truck tires. Use on manual or automatic changers. 70 psi safetyrelease valve. USA made. Select bead seater for 24"- to 34"-dia. tires or 10"- to 22"-dia. tires from drop down box above.