This is a 10pcs substitute tip set for weller ET Tip series,not OEM but of good quality and lasts of a long service life. Compatible with EC1201A,EC1204A,PES50,PES51,LR21 ,WCC101 soldering iron,DEC1001/WES50/WES51/WE1010NA/WESD51/WCC100 WE1010NA solder station. Tips come in different sizes and shapes, with them you can do almost anything from micro pcb soldering to big gauge wire soldering,solar soldering and SMT repair work. UPC:706693853830