1,motorcycle butyl tube 2,size:3.00-18 3,strong ... good air-tightness 5,long mileages Description of goods: Butyl motorcycle inner tubesize:3.00-181,own brand:WINHUA2, ... ,ISO9001 INMETRO SONCAP,CIQ...we have Natural rubber and butyl rubber inner tube of motorcycle tyres,Bicycle tire,trucks ... are as below:Size/Specifications(Natural /Butyl Rubber)Valve modelUnit weight(kg)1.85-17TR40.272.00-17TR40.292.25 ...