TWe have many of these tips. We'd like to have fewer. Maybe you can help us out. These tips have been in the storage closet for so long, no one knows where they came from. The tips are in excellent condition. This is a 3/8" wide chisel tip on a 1/4" shank, which will fit our Esico 80W iand 100W soldering irons (#7011 and #7002). These quality tips are a great value at this price.