Autosampler Vials, Caps, and Closures. Aijiren Techbrand™ Manual Crimper, Steel, for Flip Top/Flip Off Seals or Flip Tear Up Seals. Crimping tools provide a reproducible, secure vial closure. Pricing and Availability. Aijiren Tech™ 8mm Clear Glass Screw Thread Vials. These 8mm vials have a 8-425 thread finish.