28 x 57 Vials, Amber, 20mL Capacity, 24-400 Thread with Solid PTFE Caps, Sold In A LAB-PAC of 144 pcs. Amber sample vials packaged in convenient LAB-PACS of 144 pieces. Made from Type I borosilicated glass. Full height partitions minimize breakage. Solid PTFE lined caps. Open top caps with septa are available under part number CG-4910.