Antex soldering bits for xs and xsl soldering irons antex b0050l0 replacement bit 23mm tip they have been specifically designed to match the power output of the heating element antex replacement bits are manufactured from high grade copper plated first with iron and then chrome to give a long working life for use exclusively on antex xs 25w soldering irons antex 50 series antex b0050l0 long life tip 50l 23mm for 25w iron