7575 Siri Hand Sponge Interchangeable by SIRI Hand Sponge New design interchangeable with the Raimondi sponge system. 5″x 12″ wide sponge makes grout cleaning quick and easy! 1/2″ thick sponge, choose from Yellow, yellow with cuts. . Posted in Repl Sponges for Grout Cleaning Equipment, Tile & Stone Tools, Tile Grouting Tools