Use Joe Porper's Tip Burnisher to give your tip a smooth, hard edge to prevent mushrooming. It is tapered from 9mm to 15mm, so it will work for you regardless of what tip size you prefer.
Ships same day with orders placed by 2pm ET.
You can return the item unused within 30 days for a full refund of the purchase price. No returns, refunds, or cancellations will be accepted on customized items, except in the case of damage or defects. If you should encounter a damaged or defective product, contact customer service within 15 days of receipt.