9mm Clear Screw Top Vial Kit w/ Blue Cap, PTFE/Silicone, Writing Patch, 100-pk Writing Patch, 100-pk. 9mm Clear Screw Top Vial Kit w/ Blue Cap, PTFE/Silicone, Writing Patch, 100-pk. Part Number: ... Shell vials are an economical choice for many routine HPLC applications. These neckless vials with inserts are sold as kits including ...