The XT backplate is constructed of 11 gauge, low carbon and rust resistant 316L grade stainless steel. This plate is { 6.5 lb | 2.9 kg } and is approximately { 15.5 in | 39.4 cm } high and { 10.5 in | 26.7 cm } wide at the base, { 9 in | 22.9 cm } wide at the top before the corner curve. The depth of the "V" is { 1.25 in | 3.2 cm }, allowing for a flatter fit against the back.