sanding disc 1.Suitable for wood, furniture, automotive industry 2.Good at grinding welding line 3.Grit:60#80# 4.Size:4,5,6' (1)Name:Alumina sanding disc/abrasive sanding disc/Sanding disc. (2)Material:Aluminium oxide. (3)Grain:60# ,80#. (4)Size:4'' ,5'' ,6''. (5)Brand:AAA(6)Usage:Grinding furniture,wood,welding line,automotive industry,wide application.