Foam risers come in both dense and soft hardness.

Diamondhead USA Foam Risers 3-7 inch come in both dense and soft hardness. These are used on the bottom of both floor polishing machines or on backer pads. Available in 3 inch, 4 inch, 5 inch and 7 inch Dense and 3 inch, 4 inch, 5 inch and 7 inch Soft In a case of 12