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Onyx is a viscous 40% phosphoric acid etchant that stays where you place it, does not run and rinses away cleanly and completely. The high-contrast black gel makes it easier to see where you have etched, and where you haven't. Use with any bonding system or technique that requires etching: selective etch or total etch.
Kit: 15 x 1.2 ml Syringes, 50 Needle Tips
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