Champion CH48109-1 Aircraft Oil Filter Champion spin-on oil filters have a 1 hex wrench pad spot-welded to a tough 8-gauge steel case designed to meet or exceed engine manufacturer specifications. Safety-wire tabs are conveniently located on hex nut for easy access. Silicone impregnated filter gasket aids in future removal. Heavy, corrugated steel center tube supports each convoluted pleat of the filter element and produces a substantially higher collapse-pressure rating, twice that of other similar filters. Maximum full-flow design, without interference from center-bolt oil filter assemblies, provides increased oil filtration each engine-operating hour.