Can't find a replacement tip for your soldering iron in stores? Give these a try! This listing is for 4 x unique shaped iron4mm diameter tips as shown in the above photo. Made from quality solid stainless steel materials for a long lifespan and environment friendly lead-free design used with standard size soldering irons around 40W. - 4 differently sized tips - Made for use with standard sized soldering irons - Solid stainless steel material for long time use - Environmental-Friendly lead-free designed