Dr. Pen A20 cartridge compatibility checklist

Before adding cartridges to cart, match the model label, connector shape and pin count. Pin count alone is not enough because different device families can use different locking shapes.

• Connector shape: compare the underside tabs and lock position with your device before opening the sealed pack.
• Model label: confirm the device says Dr. Pen A20 or the exact model named on the product page.
• Pin count: 12, 14, 18, 24, 36 and 42 pin options cover common A20 microneedling needs; nano options are for gentle finishing passes.
• Single-use sterile reminder: keep cartridges sealed until use, use a fresh cartridge for each session, and do not reuse opened tips.
• Shipping and returns: orders ship with tracking to the US, Canada and Australia; unopened wrong-model items follow the posted return policy.