Convert a 510 hole size to 810 hole size. This Stainless Steel 510 to 810 Drip Tip Adapter is designed for use with many popular 510 tanks and RDAs. It allows for larger 810 sized mouthpieces/tips to be used, giving users greater personalization and flexibility. The adapter is made from highly durable stainless steel, making it suitable for long-term and frequent use.