Vial crimpers are used to crimp laboratory vial caps to provide an airtight seal which is particularly useful in mass spectrometry techniques such as headspace GC-MS. Most vial crimpers include an ergonomic design to reduce hand strain and are adjustable to control the amount of force used allowing researchers to fine-tune their vial crimpers to achieve an optimal seal. Many labs also purchase a vial decapper to safely remove vial caps after analysis to allow for proper disposal. Laboratory vial crimpers come in manual as well as electric models and are available in numerous sizes to fit multiple vial styles, be sure to consider the size and type of vial your laboratory uses to ensure compatibility with the vial crimper.