I spoke with our contact at Hopkins and he was able to tell me that the winter protection windshield cover # HM17511 is vinyl and sewn on the edges.
If you tend to leave the windshield cover on 24/7 is may deteriorate quicker over time but in general the product life should last quite a while. There isn't a specific life span for this product because there are so many variables that could affect it's life expectancy.
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The Towed Vehicle Battery Charge Wire Kit for Demco Supplemental Braking Systems # DM66VR uses a 14 gauge wiring. The ground wiring should be 12 or 14 gauge.
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