Purchased for deadening. Selling the excess. ■Size■ Approximately 1000mm (1.0m) x 500mm (50cm) x 2mm Approximately 4 meters and a bit remaining. (The following is quoted from the Rakuten product description) ■High-performance damping material sound quality improvement deadening sheet ■Due to the unique adhesive technology (butyl mixing ratio), it is less sticky during work and has excellent temperature characteristics, minimizing changes in sound quality. ■You can clearly hear the difference in sound when knocking on the door before and after installation. The sound changes from a resonant "bang bang" to a non-resonant "thud" sound. ■Tile-like surface is convenient and easy to use The tile-like grid pattern on the surface of the deadening sheet makes it very convenient for cutting. ■High-density damping material High density 2.0 ※Indicates that it is 2.0 times heavier than water = 1.0. ■Contents■ Specification: Damping material for deadening