Autoclavable Microetcher® IIA optimizes intraoral, restorative surfaces, increases bond area and strength up to 400%. To reduce risk of air emphysema when using microetcher intraorally, join to handpiece air (40-45 psi nominal) with the Microetcher Handpiece Adapter 4-5 Hole. Connects 1/8 airline to all standard MW handpiece chairside adapters.