View MX Options Door Size H × W (in.) Door Size H × W (mm) Wall/Ceiling Opening H × W (in.) No. of Stud Catches/Latches Shipping Wt. (lbs.) Shipping Wt. (kg.) 12 × 12 305 × 305 12 3/8 × 12 3/8 1 6.3 2.9 18 × 18 457 × 457 18 3/8 × 18 3/8 1 10.5 4.8 24 × 24 610 × 610 24 3/8 × 24 3/8 2 16 7.3 30 × 22 762 × 559 30 3/8 × 22 3/8 2 18 8.2 30 × 30 762 × 762 30 3/8 × 30 3/8 2 27 12.2 36 × 24 914 × 610 36 3/8 × 24 3/8 2 24 10.9 36 × 36 914 × 914 36 3/8 × 36 3/8 2 36 16.3