Check the listing for details. 4" Alpha Ceramica EX Diamond Polishing Pad. Condition: New. Listed at 22.85 USD. Alpha®, the manufacturer of the “Original Ceramica Polishing Discs”, has created the next generation of polishing discs, Ceramica EX. With the proliferation of engineered stones, Alpha® recognized the need for polishing discs that could work effectively on these challenging new surfacing products. After extensive research and development, Alpha® established the diamond and bond formula best suited for today’s engineered stones, the result: Ceramica EX. Our research determined something else; Ceramica EX works extremely well on all natural stones, too. As a result, Ceramica EX can fulfill all the needs of all stone fabricators; one set of polishing pads that can produce a high quality shine on granite, engineered stone, quartz surfaces, marble (including hard to polish black and green), terrazzo and porcelain tile and slab. Ceramica EX pads work quickly to achieve desired results. They are cost-effective, long-lasting and made from the highest quality raw materials. As an added bonus, they are priced more competitively than the original Ceramica. Ceramica EX pads are extremely flexible, too. They are great for polishing inside corners and a tight radius. Use the Alpha® 2” Flexible hook and loop Backer Pad on really tight curves.