Remind: The velcro backer/pad holder are with water feed hole, can be used for wet polishing.

This package:

18 Pieces of 4" Pad for granite marble concrete

 and 1 Piece 4" Backer (5/8"-11 female thread arbor), 

the 18 Pads are: 

4 Pcs X Grit 50 100 200,

2 X Grit 400,

1 X Grit 800 1500 3000 10000.

Remind: velcro backer's max capacity is 5000RPM, please don't use it with high speed polisher/grinder.

- 3.2mm thickness

- recommend 3500 - 5000 rpm  (grinder or polisher speed must be lower than 5000 RPM).

- wet or dry use (wet use recommended).