Note:Please allow for some errors in manual measurements. Features: 1、Wide Usage: Trimmer replace gear head used for brush cutters, trimmers, lawnmowers, etc. Fits for various strimmer trimmer brush cutter lawn mower. 2、Premium Material: Lawn mower gear head made of high quality aluminum and iron materials, strong and durable, has excellent oxidation resistance. 3、Perfect Accessory: Brush cutter gearhead has exquisite workmanship and stable performance, it is the perfect mower accessory. 4、Replacement: Trimmer gear box would be a great replacement for your old or broken ones. It extends the life of your machine and is perfectly matched to your machine 5、Broad Compatibility: Grass trimmer gearhead fit for 26 mm/1.0in unlimited models and unlimited speed petrol brushcutters such as for Stihl, for Ryobi, for Homelite, etc. Specification:Item Type: Lawn Mower Gear HeadMaterial: Iron, AluminiumWeight: Approx. 540g/19.0ozSize: Approx. 12x7x8.5cm / 4.7x2.8x3.3in Applicable: Universal gear