description resin bond metal grinding disks - 400-800 grit 3mm metal bond diamond concrete polishing disk for national flooring equipment gp3000 concrete grinder and polisher. california proposition 65 warning. features 400-800 grit for national flooring equipment gp3000 concrete grinder and polisher resin bond polishing disk specifications acme tools brand name national flooring equipment acme tools part number 501666 assembled weight (lbs) 3 california proposition 65 warning required yes country of origin china globaltradeitemnumber (gtin) 00400016002188 package contents 1 polishing disk package depth 6 package height 3 package weight 4 package weight (lbs) 4 upc 400016002188