Gem Silage Products and Dominion Ag-Bag Ltd., two great companies for all your silage needs. Up North silage covers. Up North silage bags. Up North silage shield. Up North grain bags. Gem bale wrap. Net wrap. Twine. Bale end caps. Silage tape. Zipper tools. Poly fastener. Gem silage baggers engineered to work, built to last! A tradition of excellence for over 25 years. Nine and ten foot models. Gem Bacteria blend, a plant host bacteria blend produced in the West for Western conditions. Gandy inoculant applicators. All sizes of Ag-Bag silage and grain bags. Ag-Bag silage baggers.