STANDARD CRIMPER------this crimper is designed for standard 20mm ALUMINUM-PLASTIC flip cap (just as the picture) and vials. Product application is very extensive. When using this crimper to sealing the 20mm vial, the rubber stopper is necessary. VERY STURDY AND LONG SERVICE------This crimper is made of 304 stainless steel which ensures a long service life. There is anti-slip sleeve on the handle, so the crimper is not easy to fall when sweating on your hand. PROTECTION FUNCTION AND BUFFER FUNCTION------Excessive force will not damage the vial mouth and cap. Under the protection function, the sealing effect is still very good. EXQUISITE APPEARANCE----This crimper is polished by hand. Not only looks good, but also feels good to use. It is processed by precision equipment with almost no error. FREE CAPS AND RUBBER STOPPERS------100 high quality caps and rubber stoppers are included. The caps and rubber stoppers are standard 20mm., Weight: 2.1605301676 pounds, Manufacturer: Chudeng