Style A Standard Round Metal Nozzle, 1/2″ Diameter Bead Steel caulk nozzle for excellent wear resistance when working on masonry and other abrasive surfaces Fits standard Albion bulk/sausage front cap #426-G01 (DL-Series gun models that end in “-T13″) 3/8″ NPS male thread 3″ long, tip cut at 45 degree angle, 1/2″ ID (5/8” OD).