description medium bond metal grinding disks - 150 grit 8mm metal bond diamond concrete polishing disk for national flooring equipment gp3000 concrete grinder and polisher. california proposition 65 warning. features 150 grit for national flooring equipment gp3000 concrete grinder and polisher medium bond polishing disk specifications acme tools brand name national flooring equipment acme tools part number 501333-m assembled weight (lbs) 3 california proposition 65 warning required yes country of origin china globaltradeitemnumber (gtin) 00400013003003 package contents 1 polishing disk package depth 6 package height 3 package weight 4 package weight (lbs) 4 upc 400013003003