Including various series of nylon and nylon steel mixed brushes . Can be used in the surface optimizing of the flamed slab, the pretreatment of antique surface and the pretreatment of sub-smooth surface of granite and marble etc. The character of products : 1. Steel 0.5 ,more wearable . 2. To reduce the cost ,nylon steel mixed brushes are made by steel 0.5 and nylon filaments 36#,combining two working procedures into one . Notice : For the steel brushes , it’s normal to breaking off few filaments when working . The working pressure should be reduced when more filaments breaking off.