Antex soldering bits for xs and xsl soldering irons antex b0055l0 replacement bit 05mm 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 antex 50 series for use exclusively on antex xs 25w soldering irons antex b0055l0 long life tip 55l 05mm for 25w iron