Honeycomb Form Tack Sponge from Hydra Sponges – has tremendous water-holding capacity, washes out clean, dries soft and pliable, and is uniform in size. Super absorbent, never hardens and has a polyester base for durability. Can be sterilized by boiling. Great for cleaning tack such as bridles and saddles. Measures 4-1/2 to 5".