Wood and bone charcoal with just the right sieve size for crucible packing of steel parts to be hardened. Hi-carbon content without waxes or fillers gives brilliant color patterns. Mixing types by specific ratio provides additional control over color and pattern. Mfg: Brownells SPECS: Packed in 5 gal. bucket. Bone – 10×28 sieve size, 25 lb. (11kg) weight. Wood – #6 size. 10 lb. (4.5kg) weight.
