This is a hard charcoal block, perfect for a variety of sodlering applicaitons. 
 
Superior heat retention, giving the user the desired reflective heat to solder faster and easier with better flow.
Measures 5-1/2" x 2-3/4" x 1-1/4".
 
Kate's Notes:
A nice hard charcoal block that will last much longer than soft charcal versions. You may wish to wrap with steel binding wire to hold block together in case of cracking or splitting which can happen with blocks that have been used over time.