Polystyrene vial Coulter® cup with polyethylene lid. Plastic Coulter container is graduated at 10 and 20 ml. Disposable PS containers for Toa® and Royco-Hycel® cell counters. Tight fitting push-on lid assures leakproof fit. Closure easily opened with just one finger. Product Dimensions (diameter x h): 1.18 x 2.2"