Bismarck Canvas Inc P.O. Box 7054 , Bismarck , North Dakota 58507 USA About Solutions products Publications videos Companies Bismarck Canvas Inc Products EXT - Conversion Grain Trailer Switch in Cab EXT - Conversion Grain Trailer Switch in Cab From EXT Electric Tarp Conversion - Grain Trailers 0 Share Includes: 1 Front Arm and 1 Rear Arm Assembly, 1 EXT Conversion Switch in Cab Hardware Box, 1 Motor 1.8 Hp, 1 Roll Tube Adaptor, and all mounting hardware. Most popular related searches grain trailer Videos related to this product Bismarck Canvas Roll Tarps Electric Tarp and Hopper Opener - Video EXT Conversion "Working in the Wind" Video EXT Conversion Electric Tarp opener in motion as it works in the North Dakota winds. Manufactured by Bismarck Canvas, Inc. Customer reviews No reviews were found for EXT - Conversion Grain Trailer Switch in Cab. Be the first to review! Add your review Publish your review Great! review successfully added!