Product name 

6 inch 150mm professional dual action random orbital sanding pad backing plate for dual action polisher 5/16-24 thread

Please note the price do not include the machine ,just one 6 inch sanding pad. 

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This Dual Action Backing Pad is designed specifically to fit the new style longer throw Dual Action polishers and in particular the very popular DAS-6 PRO Plus Polisher. 

With a 5/16"-24 thread it will also fit DAS-21E and Rupes machines.

The backing plate features ventilated cooling channels to help reduce heat transfer.

The  medium density versatile backing plate, ideal for use with all grades of pads and polish.