Comparison : Item # A336EC, Super Adjustable 18" x 36" x 68" Wire Cart
Item # A356EC, Super Adjustable 18" x 48" x 68" Wire Cart
Item # A366EC, Super Adjustable 18" x 60" x 68" Wire Cart
Item # A436EC, Super Adjustable 21" x 36" x 68" Wire Cart
Item # A456EC, Super Adjustable 21" x 48" x 68" Wire Cart