micro insert with mandrel interior and polymer feet manufacturer from Amazon
National Scientific Polypropylene Mandrel Interior Conical
National Scientific Polypropylene Mandrel Interior Conical Base Inserts, Insert Diameter 6mm, 250µL Volume (Case of 1000): Science Lab Vials: Amazon.com: Industrial & Scientific
1.5mL 11mm Crimp Ring Vials ND11
Micro-Insert, 31*6mm Clear, Flat Bottom, Suits for 11mm Crimp-Top Vials: 250uL Conical Micro-Insert, 31*5.7mm, Suits for 11mm Crimp-Top Vials: 250uL Micro-Insert with Mandrel Interior, & Polymer Feet, 29*5.7mm, Suit...