The Monument 2355M OMAT(r) Soldering Mat has the following specifications: Size: 305mm (12in) Pipe Capacity: 15-22mm The Monument OMAT(r) Soldering Mat is a patented cut out mat for soldering copper pipes from 15-22mm in diameter. It reduces the risk of fire, and its unique shape with overlap gives a tight and secure fit. Unlike conventional soldering mats the OMAT(r) wraps around the pipe offering complete protection to the surrounding surfaces. The OMAT(r) is constructed from a woven glass fabric and does not present any of the hazards associated with asbestos materials. Additionally, it is stitched all around and will resist temperatures up to 600C. Made in Britain.