Humac Engineering 50 Derrynaseer Road , Dromore , County Tyrone BT78 3BH United Kingdom About Solutions products Companies Humac Engineering Products Humac - Semi Off-Set Grass Topper Humac - Semi Off-Set Grass Topper 0 Share Standard Features: Easy Adjustable Skid Heights. Direct Drive Gear Box. Heavy Duty Drive Shaft. Customer reviews No reviews were found for Humac - Semi Off-Set Grass Topper. Be the first to review! Add your review Publish your review Great! review successfully added!