Replacing OEM numbers: The carbon brush size of this product is 7mm high, 12.5mm wide and 25mm long, which is a direct replacement for the old or broken one. Compatibility: This Carbon Brush is Compatible with Hilti Power Tools. Product material: This product is specially designed and made of metal, with a long service life and not easy to damage. Easy to install: Direct replacement without adjustment, perfect compatibility and high reliability. Product list: Product include a total of 4pcs Motor Carbon Brushes, which can completely meet your daily use needs and replacement., Manufacturer: SG Store