Dr. Pen Ultima A1 Replacement Cartridges - (10 Pack) - 36 Pins (0.25mm) Bayonet Slot - Disposable Replacement Parts

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So what I like about this product is the needles are sharp your not dragging them across your face the go in and out of the pen like they should another reason I buy from this company is because they offer different sizes and number of needles in cartridges. I use these for microneedling they are perfect for the money .