Monroe MKC3190 Keyboard Spill Cover Protective seal is custom made for your Monroe 3190 calculator. Special Ultraflex ™ material provides excellent touch without decreasing key sensitivity. Resists Dust Build Up, Oil, Spills, Dirt, and Debris Tear, Crack and Abrasion Resistant Cleans Easily Wth a Damp Cloth Easy to Install Designed for 3190 series