For the BIGGER jobs. 20C and 32C are 115v, 42C is 220v. If you order with a heater the unit will be 220v.
The Colonel may be modified with several options. Our suggestion is to get all the details on your adhesives being used, what temperature range is suggested by the glue manufacturer for applications, descriptions of the material the adhesive is being applied to, a description of the item being glued, and an idea of the glue coverage you are looking at and send us an email.