24-7068-7609 is a lead-free, no-clean, 3.3%/275 flux-cored wire with Sn96.5Ag03Cu.5 as its alloy material. It has 0.40mm (0.015) diameter and weighs 1lb per spool. Kester 275 No-Clean Flux for cored solder wire was developed to provide superior wetting performance for hand soldering in the electronics industry. The use of 275 No-Clean Flux results in an extremely clear post-soldering residue without cleaning. The unique chemistry in 275 was also designed to reduce spattering common to most core fluxes. 275 can be used for both lead-free and leaded soldering. 275 is classified as ROL0 per J-STD-004.