Popular round shape polypropylene carboys with handles and 83B white polypropylene screw closure closure, autoclavable PP. Excellent for large batches of culture media, distilled water and other solutions. Graduated to contain in 1-gallon and 5-liter increments. Not recommended for use with hazardous materials. Accepts No. 13-1/2 rubber stopper. NOTE: For best results, autoclave using a properly vented closure.