Clearboys are transparent, durable, lighter and safer than glass. Autoclavable for sterile applications. Useful for large-volume media and culture preparation, especially where visual inspection of contents for quality is important. Ideal for refrigerated or frozen storage of aqueous solutions. Graduated in 1-gallon and 5-liter increments. Closure size is 83B (83 mm). NOTE: For best results, autoclave using a properly vented closure. See Sterilizing in the Reference section.