Screw cap,solid top with PTFE liner,pkg 100 solid green . Screw cap,solid top with PTFE liner,pkg 100 solid green melamine resin cap,F217/PTFE liner,for use with 4 mL vial with 13-425 thread; find Supelco-27141 MSDS,related peer-reviewed papers,technical documents,similar products & more at laboratory vials online-Aijiren.