20mm aluminum-plastic cap Usage:vial Feature:Non spill Colour:red,blue,black,white and so on 20mm aluminum-plastic cap1.Type: flip off cap2.Usage: vial3.Feature: Non spill4.Color: red,green,blue,purple,yellow and so on.5. Sample lead time: 15days.Large production capacity ensures the shipment on time. 20mm aluminum-plastic cap