Excellent for breaking-up air bubbles from investment, Jewelers use Debubblizer. It's a surface tension reducer applied to wax before investing. Designed to use with an investement vibrator. Supplied in 8 oz. bottle. Jewelers use these highly-flexible vulcanized rubber bowls. Easy to grip, will not be marred by a spatula and clean with ease. Use up to three pounds of investment per run.