The Department of National Defence has a requirement for thesupply all labour, consumables, materials, supervision, travel, transportation cost and equipment required to performsupply, return and exhaust ductwork for various areas throughout Canadian Force Base (CFB) Trenton and various satellite locations, as detailed in Annex “A”. This Standing Offer will be for a period of three (3) years with an irrevocable option to extend the term of the Standing Offer by up to One (1) additional One (1) year period under the same conditions.