GF Preston is authorized dealer for Doosan construction equipment.  Located in Sundridge, Ontario, we are less than an hour from Huntsville and North Bay, and just three hours to Toronto.  We carry a full line of Doosan excavators and loaders, including crawler excavators, wheel excavators, mini-excavators, wheel loaders, and skid steer loaders.  In addition, we also have a variety of used construction equipment from Case, Caterpillar, and other top industry manufacturers.