I-Chem Brand 320-2000 Clear Glass 2000mL 300 Series Type III Wide Mouth Jar, with PTFE-Lined Polypropylene Closure, Short, Certified (Case of 6) Wide mouth jar, clear, short, Type III glass, certified with PTFE-lined polypropylene closure Capacity: 2000mL; closure size: 110-400; series: 300; Closure Materiel: Polypropylene; group: 1 and 2 Excellent for use in soil, sludge, and sediment sampling Meets the EPA's performance based specifications for metals (group 1) and semi-volatiles/pesticides/PCB's (group 2) analysis Includes a certificate of analysis with a bar-coded production number in every case