Sturdy MFG Co. Hybrid SturdyTip for Boro/dotAIO Sturdy Mfg Co. presents the Hybrid SturdyTip, a three piece integrated drip tip threaded for both Billet Box threads and dotAIO threads. These expertly engineered drip tips feature a near seamless design with buttery threads that convert from the larger Billet Box threads to the smaller dotAIO threads. Beneath the tip portion is a knurled tube with two o-rings to secure the tip. Includes: 1x SturdyTip1x Spare O-rings baggie