MOOSE OFFROAD Inner Tube - Heavy Duty - 18" - TR-4 - Center Metal Valve MSL-13MOOSE OFFROAD Inner Tube Heavy Duty 18" TR 4 Center Metal Valve MSL 13 European made, these are the sturdiest, highest quality tubes on the market, Heavy duty tubes made specifically for off road and motocross, 3mm thick natural rubber construction helps resist pinch flats, TR 4 valve stems ATTRIBUTES: BRAND: MOOSE OFFROAD MPN: MSL 13 SKU: 03500686