Metal Form is an important maker, supplier and exporter of Radiator Accessories, Radiator Caps, Radiator Pressure Caps, Plastic Radiator Pressure Caps, Radiator Filler Necks, Oil / Fuel Filler Caps and many more. Metal Form offers Radiator Filler Neck available in all three sizes as per SAE Nomenclature i.E. Mini / Small / Medium. The company also manufactures micro filler necks for Micro Caps and Renault Filler Necks. The filler necks are manufactured from brass and available with or without overflow pipe brazed. The radiator filler neck small is Aluminum Filler Neck is in higher gauge thickness mainly for Aluminum Radiators.