Thermo Fisher Scientific Nalgene Rectangular Tank with Cover. Good resistance to stress cracking and tolerant of many organic chemicals and polypropylene tanks can be autoclaved. Very versatile at a much lower cost that stainless steel tanks. Tanks come with cover and can be modified with factory-installed spigot. 21CFR177.1520. USPVI. Material PP. Volume 57l. Graduated Yes. Length 610mm. Width 310mm. Height 310mm. Sterile No. Autoclavable Yes. Pack Qty 1.