Item: BGTEC Diamond Turbo Row Grinding Cup Wheel For Marble Granite Concrete Stone Quantity: 1pc Package: Paper Box Specification: · 4.5"/Dia115mm,Bore 22.23mm,Segment thickness 5mm,Grit #40/50; Application:Suitable for grinding marble,granite,concrete,brick,masonry,etc... Feature: 1) 5mm thickness diamond coated segment,strong steel base,longer endurance. 2) Turbo row segment design,compact arrangement,better finish quality. 3) Air hole design helps heat dissipation and scraps discharge,higher efficiency. 4) Dynamic balance test,grinding evenly,no shaking. Customize Service:If you order more than 20 units of same specification,we could mark your LOGO on the products.Please contact us first.