www.restek.com 355 VIALS & SYRINGES | VIALS Microsampling Inserts *Big Mouth insert w/glass flange (step design) not to be used with 9 mm screw-thread vials. Inserts for 2.0 mL, 11 mm Crimp-Top & 2.0 mL, 9 mm Short-Cap, Screw-Thread Vials Inserts for 2.0 mL, 8 mm Screw-Thread Vials Polypropylene inserts available on request (1,000-packs only).