4" Diamond DRY Polishing Pad 65 + Aluminum Backer Granite marble glass mosaic

The aluminum backer and PVC backer is 5/8"-11 Thread. (b) 1 Piece Aluminum Backer (5/8"-11 Thread). (b) 1 Piece PVC Backer ( 5/8"-11 Thread). very important remind: PVC backer's max velocity is 5000 RPM.

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