Review on TINGZHIGO Inflatable Stainless Steel，Kayak Accessories by Will Jenkins

We are retrofitting a 2020 Metris transporter. Of course all hardware is metric so I order metric sizes even if it's a new addition. M6 is the size of the nut (or whatever you call the built in nut) on the roof. I had to order roof rails but they don't use all nuts on the roof. They are great for extra ties. For example, I attached two solar panels to the crossbars that connect to the rails. Then use them along with a metal cable as a safety lanyard in case something detaches from the solar panels as we drive down the highway. Stainless steel, they must withstand the elements.