These are lots of about 1500 pieces of pre-cut silver solder chips for jewelry fabrication. USA Made and lead-free and cadmium-free; chips are 0.5mm mx 1mm x .25mm; melt 1275 degrees F, flow 1360 degrees; 70% silver; for jewelry fabrication, teaching, jewelers, craftsmen; beginners should have adequate live instruction; grab a tweezer full of chips and set them down on your charcoal block; no more cutting; the chip sizes are excellent to work with and pretty consistent; one customer suggests you use paste flux for a good join; use a small paint brush dipped in the paste flux to pick up and place the solder pallions. This product is cadmium and lead free.