These multipurpose polyurethane sponges are useful for scrubbing and cleaning of car windshield, body, seat, instrument panel, and other car interiors and also for all kinds of furniture, glass, kitchen utensils, washing machines, refrigerator surface, LED TV, laptops etc. Also these magic sponges for car cleaning are suited for washing dishes, counter tops, tiles, sinks etc. These reusable sponges are easy to use and clean. For best results, wash in water and just air dry. Please note that the size of the large sponge is 17x7x3 cms. these dimensions are approximate dimensions and there may be slight differences. Sometimes these kitchen sponges become hard when dry, in such cases just soak them in water to reuse. The sponge weighs approximately 60-70g. Also, the texture of the sponges may differ as the hardening process/results of polyurethane may vary from time to time, even during manufacturing. However, this does not affect the overall efficiency of the product.