Clearboy (Transparent Carboy) with Spigot, PC (Polycarbonate) bottle, PP spigot and white PP screw closure, TPE gasket These tough, glass-clear, autoclavable carboys are ideal for dispensing sterile water, aqueous reagents and media. Use in cold rooms, even at subfreezing temperatures. Spigot boss molded in one piece with bottle, for strength and leak resistance. Spigot closure (Cat. No. 6423-0010) included. Graduated to deliver in 1-gallon and 5-liter increments. Closure size is 83B (83 mm). Autoclavable/Transparent/Graduated/Leakproof† Nominal Shoulder Capacity: 20 l Brim capacity: (approx.) 22.5 l . NOTE: Dismount and disassemble spigot before autoclaving. For best results, autoclave using a properly vented closure.