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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