Remind: The 5/8"-11 Female Thread arbor velcro backer/pad holder are with water feed hole, can be used for wet polishing.

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This package:

15 Pieces of 4" Diamond wet dry (wet use recommended) PolishingPad for granite marble concrete

 and 1 Piece 4" Backer 

(5/8"-11 female thread arbor), 

the 15 Pads are: 

3 Pcs X Grit 50 100,

2 Pcs X Grit 200 400 800,

1 Pcs X Grit 1500 3000 10000.

Remind: velcro backer's max capacity velocity 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 RP).

- wet or dry use (wet use recommended)