Only suitable for very robust hard surfaces such as stone or tiles, as hard plastic bristles are incorporated between the microfibers; not suitable for soft surfaces such as wood or natural stone including marble. High-quality microfiber, machine washable up to 60C. Do not use fabric softener. Due to the hard bristles, heavy soiling on surfaces and in joints can be easily cleaned. Thanks to the integrated bristles, the stone roller set effortlessly removes stubborn dirt and makes joints and uneven surfaces shine. Compatibility: For Karcher FC7, FC7 Premium, FC5, FC 5 Premium, FC 5 cordless, FC 5 Premium cordless, FC3 cordless, FC 3 Premium cordless. Replacement Part Numbers: 2.055-021.0, 20550210. Color: as shown Material: plastic Size: 14.5 cm Package Contents: 4 x Roller Brush 1 x Cleaning Brush Only the above package content is included; other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may vary by +/- 1-3 cm.