We searched high and low for a product like this. We could not find one, so we made our own. After repairing WAY too many 7 Way Flat Trailer Plugs due to them laying exposed to the weather when not connected, often just "laying in the dirt", we sought a good option for protecting the 7 Way Flat Trailer Plug. When so many manufacturers are trying to find ways to "cheapen up" their products, we went the opposite way, and did all we could to make this product more durable, without going overboard. We use a Vinyl Cap, a 304 Stainless Steel Chain, and two 316 Stainless Steel Split Rings. We also include a packet of Silicone Dielectric Grease to further protect your plug from corrosion. The 7 Way Flat Trailer Plug in the photos is to show our product installed, the 7 Way Trailer Plug is NOT included. This Cap also fits the Meyer Universal Round Plow Side Harness as well on E-58, E-68, V-70, and E-72 units.