... high grade concrete floor grinders and polishers with reasonable price.JS concrete floor grinders and polishers occupy the market because ... a vacuum cleaning motor itself, it works without dust. Don't need to connect another vaccum cleaner, Say "2 in 1 ... 1500rpm4kw220v120kgs10LNotes: the power of vacuum cleaner is 850W (JS-400A, JS-400B), 750W(JS-400C,JS-400D)Others:1,Minimum order quantity:1set2,Lead ...