Economical and efficient alternative to glass vials. Major advantages include higher efficiency, lower background and overall higher performance. Manufactured from an improved high density polyethylene blend of polyethylene that resists solvent permeation. Biodegradable solvent based cocktails can be stored indefinitely in these vials. Shrink wrapped trays contain 100 vials within cell partitions Caps are in sealed bags, 100 per bag Capacity 20 ml Cap Size: 22 mm Dimensions (Cap On): 28 x 61mm Capacity 20 ml Cap Size: 22 mm Dimensions (Cap On): 28x61mm