Materials - The brush cutter gearbox is made of high quality aluminum alloy and steel. It is rust-proof, corrosion-resistant and has excellent anti-oxidation. Available specifications - There are 3 reducer sizes: 26mm ID + 7 splines; 26mm inner diameter + 9 splines; 28mm inner diameter + 9 splines. REPLACEMENT PARTS - A brush cutter gearbox head is the ideal accessory for a trimmer; it is a perfect replacement for your old or broken one. COMPATIBLE - The brush cutter reducer can be used normally with brush cutters, trimmers, lawn mowers, etc. Easy to replace parts, simple and convenient to connect the mower. Wide range of applications - Lawn mower reducers provide stable performance and good working conditions, making them ideal for horticulture, agriculture, livestock farming, aquaculture and forestry.