The Charcoal Block (4" × 1") is a high-quality laboratory and workshop accessory widely used for heating, soldering, melting, and flame-based experiments. Made from pure, dense, and finegrained charcoal, excellent heat resistance and thermal insulation, making it ideal for use with a blowpipe or burner flame.Each block measures 4” x 1”,a compact yet effective working surface that withstands high temperatures without cracking or disintegrating. The smooth & porous texture of the block allows easy pinning of small components and uniform heat distribution, ensuring efficient flame work and sample testing.