The AVCT 510/810 Resin drip tip is designed to fit with both 510 and 810 connections. With O-rings to provide a snug fit, the 510/810 Resin drip tip by AVCT Vape fits most atomizers. Each drip tip has several rings of multi-colored resin to add a truly unique pop of color to your vaporizer. There are main color styles such as, blue mixed, green mixed, orange mixed, silver mixed, and black mixed. No two drip tips are alike.