SUBA™ polishing pads are polyurethane impregnated polyester felts. They are specifically designed for stock and intermediate polishing where achieving a high precision surface is critical. SUBA™ pads should be used in combination with each other and with final polishing pads to produce a haze-free, low defect finish in dual or multi-step processes. SUBA™ pads are ideal for a w ide variety of materials including semiconductor wafers, glass, ceramics, special metals and plastic. SUBA™ X is a denser, harder pad with smaller pore structure than the SUBA™ IV pad. It is often used for polishing glass, quartz or ceramics with consistent, reproducible results.