2 layer wire shelving rack

wire shelving rack with 2 levels shelves. 

component include:
2 pieces wire shelf
4 upright column
4 leveling feet
1 set of plastic split  to attach shelves

2-shelf-wire-shelving

Post height: 18" 24" 30" 32" 36" 40" 48" 54" 63" 66" 71" 74" 78" 86" 96"

Shelf size , width*length
14"x24" 18"x24" 21"x24" 24"x24"    
14"x30" 18"x30" 21"x30" 24"x30"     
14"x36" 18"x36" 21"x36" 24"x36" 30"x36" 36"x36"
14"x42" 18"x42" 21"x42" 24"x42" 30"x42" 36"x42"
14"x48" 18"x48" 21"x48" 24"x48" 30"x48" 36"x48"
14"x54" 18"x54" 21"x54" 24"x54" 30"x54" 36"x54"
14"x60" 18"x60" 21"x60" 24"x60" 30"x60" 36"x60"
14"x72" 18"x72" 21"x72" 24"x72" 30"x72" 36"x72"
Other size can be customized