3528 20mm vial caps products are offered for sale by suppliers on Alibaba.com, of which lids, bottle caps & closures accounts for 58%.
A wide variety of 20mm vial caps options are available to you, such as aluminum, plastic and aluminium-plastic.You can also choose from vials, bottle and cream 20mm vial caps,as well as from non-refillable, non spill, and child-proof 20mm vial caps, and whether 20mm vial caps is colorful, clear, or blue.