**This item is currently available for pre-orders. Shipping in September of 2025.** The Onset EZ™ Pen buffers individual cartridges of local anesthetic to adjust their pH to a more neutral pH prior to use. Each Onset EZ Pen contains a sterile solution of 8.4% Sodium Bicarbonate and Water for Injection, enough to buffer 30 local anesthetic cartridges. Fast & Easy Buffering - Buffer your local anesthetic in seconds. No training needed. Preferred by Dental Assistants. Built for Efficiency - Delivers 30 doses without extra packaging and Sharps waste. One EZ Pen per operatory. May be used over 30 days after opening. Fully disposable once empty. Trusted by Dentistry - Over 10 million doses delivered in the marketplace. Precise pH buffering. Affordable Technology - Premium results at a low cost per injection.