The Powermaster Coffin 2.5Sq junction box is a compact electrical component designed for use in limited space installations. Measuring 75mm in length and 40mm in width, it has a capacity of 2.5 square millimeters. The 'Coffin' name refers to its long and narrow shape, making it suitable for applications where a small junction box is required. This junction box can be used to connect and protect electrical wires and cables, making it a common component in electrical installations in homes, offices, and industrial settings.