Designed to fit the Domnick Hunter DHY D Series line, Grade A is the activated-carbon adsorber in a typical compressed-air filtration train, rated to 0.01 micron — its role is to remove residual oil vapour and hydrocarbon odour after coalescing stages, polishing the compressed air for sensitive end uses. The Ultramax Systems Grade A element is built to match the Domnick Hunter OEM specification on dimensional fit and filtration outcome, so it slots straight into the genuine Domnick Hunter housing with no modification. A like-for-like, Australian-stocked replacement at a meaningful saving against the genuine Domnick Hunter part, with comparable service life and air-quality outcomes.