... 3.usage:automatic,hardware,stainless,wood Abrasive flap wheel:1.Material:aluminum oxide,zirconia corundun,pure cotton. ... have been a professional manufacturer of abrasive product for more than 10years,and we are one of ... and we are willing to offer you free samples for testing. Every year,20% of our products ... Production machine:Cooperative Partner:Certification: sanding wheel for polishing metal&wood