DescriptionThis is a heat sink set used to run voltage regulators, MOSFETs, BJTs, and any TO-220 package parts at their full capacity.It is compatible with both single and dual gauge TO-220 integrated heatsink tabs. For single gauge (the thin style) heatsink tabs you will want to trim or file down the small diameter section of the plastic insulating washer. A simple file such as a nail file works well.Package includes1×Aluminum heat sink with threaded mounting screw hole1×Electrical insulator sheet (conducts heat but not electricity)1×Plastic insulating washer1×Mounting screw