These 20-Liter low-density polypropylene carboys are a good choice for storage and transport of reagents. LDPE resin is made using less catalyst than HDPE and is a better choice for reagents sensitive to the polymerization catalyst. Round, graduated to contain. Wide shoulder handles allow easy carrying and pouring even with gloved hands. Comes with valve-sealing 83B closure and neck will accept no. 13-1/2 rubber stopper. Sold individually or 4/Case. Nalgene#: 2210-0050.