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Acid Encapsulating & Neutralizing Pillow^ Acid Encapsulating & Neutralizing Pillow, Color: Mauve, Dimensions: 12in Wx12in Lx1in H, Composition: Skin-Polypropylene Filler-Sodium Carbonate, Alizarin, Absorbency: Up to 1 gal, Instantly absorbs up to 98% concentrations of sulfuric acid