10ml clear serum vials with caps and stoppers different color for flip off seals 20mm black, green, pink, ... , royal blue, dark blue, mist grey, dark greydifferent color for stoppers 20mm.additional service: 1. custom logo printed on 10ml vials2 ... vials.3. custom logo on seals. 4. custom logo on stoppers. material: 10ml vials made by clear sterile serum vial, 20mm ...