5183-2087 Flat-bottom inserts, polypropylene Part No. Description (1000/Pack) 5183-4731 Crimp or snap caps, polypropylene, wide opening, 300 µl Clear, snap top vial Clear, snap top vial with write-on spot Amber, snap top vial with write-on spot Glass lined polypropylene Flat bottom polypropylene Wide opening polypropylene