Handheld manual and electronic crimpers and decappers. Aijiren offers a wide range of handheld manual and electronic vial crimpers and decappers designed for standard 11 mm crimp caps (2 mL vials) and headspace 20 mm crimp caps (10 mL and 20 mL headspace vials). Aijiren handheld electronic vial crimpers deliver tight, reproducible seals every time. Slim, adjustable steel jaws fit around closely spaced vials, enabling you to crimp vials directly in vial trays.