SSI SCHAEFER is largest manufacturer of waste carts worldwide. Having a global footprint means sustaining temperatures reaching in excess of over 120°F. SSI SCHAEFER quality experts go to the extreme and test containers in an upright position inside a convection oven reaching 190°F temperatures for three days. Dimensional changes occurring due to heat storage must be no more than 1.5% and must remain within tolerances specified for each container.