used amal pre monobloc 76 / 276 models bsa triumph ariel norton ajs royal enfield vincent velo panther carb show not included threaded ring -split for air filter or air filter hose to push over thick walled brass 14 mm length internal dia. on thread = approx 30.25 mm external dia approx 38 mm and 41.5 mm on the last thin lip steel but will work with other makes enfield panther norton ariel ajs matchless triumph Carb shown is NOT included , to fit triumph triton tribsa BSA norton sunbeam PANTHER ARIEL AJS MATCHLESS velo etc etc ,
