Borosilie COD reagent vials distributors Sigma. Borosilie glass 300 mL Contact Aijiren 1472463 Compare Laboratory Bottles, Polypropylene, Autoclavable, Wide Mouth, 1-L, 6/pk Wide-mouth PP 1000 mL Contact Aijiren 2087076 Compare Bottle, Sampling, Low Density, Polyethylene, 250 mL, 12/pk