This soldering block (sometimes known as a Supablox) is a good quality, long-lasting fire-proof soldering block that provides a safe surface on which to solder and keeps the heat exactly where you want it – on your piece and not on your workbench!It is essential for soldering or firing metal clay with a gas torch as it cleverly concentrates the heat on the piece being soldered rather than absorbing it. It has all the qualities of asbestos, don’t worry – it doesn’t contain any. Size: approximately 12.5 x 7.5 x 2.5cm Sturdy but can be easily carved into to make handy recesses for housing pieces which are tricky to support during soldering We recommend buying more than one (in fact we think this is such a good idea we offer a cheaper price if you buy two or more) so you can create a 'cave' to assist with achieving constant temperatures needed when soldering larger pieces (which can be tricky - this helps by reflecting all of the heat onto your piece) or to keep one for breaking into smaller blocks to support fiddly pieces. Asbestos-free Sold individually