The Hydro-Bat is made of Hydro-Stone, a USG product containing cement and crystalline silica, that is 8 to 10 times stronger then pottery plaster. The surface is scratch resistant yet absorbs water like plaster eliminating the need to cut your pieces off the bat with a wire.
The Hydro-Bat was designed to fit on wheel heads that have bat
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Three 14" hydro-bats received in excellent condition. Perfectly flat and fit my wheel bat pins precisely. I have an assortment of smaller hydro-bats and they are great for bowls or plates.