Wholesales clear hplc vial caps price for Aijiren China HPLC Vial Caps Manufacturers, Suppliers, Company. 1.Standard vials for GC and HPLC. 2.Vials with integrated Micro-Insert are available. 3.11mm hand crimper & 11mm Decapper. 4.Vials have a 40% larger opening than standard opening aluminum seal vials. 5.Vials are manufactured of Clear or.