Hydra Honeycomb Form Tack Sponge is an excellent, heavy duty sponge fit for tough and serious tack cleaning. This rounded, highly absorbent sponge features a polyester base for increased durability. Ideal for horse bathing, saddle cleaning, tack cleaning, and barn chores such as cleaning buckets. Does not harden. This sponge can be easily sterilized by boiling. Measures in at 4 1/2 in. x 5 in.