This three-piece package, Metal Tip, is designed by Barbara Trombley for Art Glitter. This metal tip attaches to the glue bottles and comes with a pin to prevent clogging. This extra tip comes in its own small bottle so you will not lose it. This metal tip attachment will help you deliver a fine, pen-like precision on your projects. The tip opening is 0.6 mm. This tip attaches to any Art Glitter adhesive spout on the 2 and 4 ounce bottles. Tip: To avoid the pin drying to the Metal Tip Attachment when not in use, place the pin only about 90% of the way into the attachment.