We encourage you to call Florida Pipette Calibrations. Their technical skills and customer support are outstanding! They have 8 Technicians based throughout Florida and can provide On Site and Mail In service options. They are ISO/IEC 17025 Accredited, and a certified Florida Woman Owned Small Business. Tell them PreciseCal Services referred you and receive a 5% discount off of your service! floridapipettecalibrations.com