3D Car Care 5.5" Dark Purple Heavy Cutting Foam PadTheres a lot of chemistry and physics that go into the design of a quality foam pad. 3Ds quality foam buffing pads use the latest in foam chemistry to create pads that simply outperform the competition. 3Ds 5. 5 dark purple heavy cutting pads are versatile because they offer medium & heavy cutting depending on what product you choose. For medium to heavy cutting try with our 3D ONE For Heavy cutting try with our ACA 510Premium Cut Compound