Includes (1) – Backing Pad # 305189001. This part replaces obsolete part #: 301239001. This is a genuine Ridgid replacement part. It is a standard hook and loop pad (Velcro) for use with 6” discs. Pad Dimensions: 6″ diameter. Includes one pad attached to a rigid plastic backing. 6 dust collection holes that vacuum up the dust and debris into the 300027056 Dust Bag Assembly.. Compatible with the following models: Ridgid R2611 Random Orbit Sander