This versatile set lets you adjust the shape and size of your hot glue bead upon application. Compatible with full-size glue guns in the following glue gun lines: Ultra Series (DT-360F, DT-3100F), Essentials Series (L-270, H-270, DT-270), Specialty Series (H-327F), and the Professional Series (PRO2-60, DT-750, HE-750). Orifice sizes are 0.076 inches for the small round nozzle and 0.120-inch for the large round nozzle. The flat nozzle has a 0.160-inch width and a 0.045-inch height. Keep this handy nozzle set in your toolbox so you can easily adjust the size of your glue stream for greater precision in adhesion.