*Multi-Quantity Transport And Storage Unit Is Designed To Transport Or Store 36 D Or E Size Cylinders.* Constructed Of Heavy Gauge Tubing And Angle Iron To Withstand Heavy Duty Use. *Corners Are Rounded To Eliminate Damage That Sharp Corners Can Create. Removable Handle For Shipping And Storage Purposes. *Available As A Stand, Model Number Mg36R, Has No Casters Or Handle But Is Equipped With Bottom Rails For Moving With A Forklift. *Openings Are 4 1/2”.