description diamond grinding disks - 20 grit pcd metal bond diamond concrete polishing disk for national flooring equipment gp3000 concrete grinder and polisher. california proposition 65 warning. features 20 grit for national flooring equipment gp3000 concrete grinder and polisher rough profile gp bonus tooling specifications acme tools brand name national flooring equipment acme tools part number 501020-pcd assembled weight (lbs) 3 california proposition 65 warning required yes country of origin china globaltradeitemnumber (gtin) 00400010010165 package contents 1 polishing disk package depth 6 package height 3 package weight 4 package weight (lbs) 4 upc 400010010165