Not as stiff as I expected being 10 gauge wire. I laid them out and put zip ties about every 2 feet. this keeps them untangled and easier to roll out/up.Very high quality product got this to connect 2 panels together leaving enough space for them to gather sunlight.NicePurchased these to give more flexibility to my solar charger. They worked great, comes with 2 cables that hook up easily to the solar charger. The only reason I am giving them a 4 and not a five is the cables are individual and they tangled easily because they are so long. I fixed that with a roll of electrical tape and about 30 minutes. They now act as one cableand can't tangle (small price to pay for the great price of the cables). Other than that these are great cables, built well and heavy duty 10 ga wire. Did not have any voltage drop or loss any charging capability. I use 4 batteries on my trailer and these cables helped keep them up to full charge by allowing me to get the charger out of the shade. They are now a part of my solar charging kit for my camp trailer.I like these cables there easy to connect to the panels I got the price was great I got them right away cudos to Amazon on there delivery thank youHaven’t tried them yet hoping they will workMaybe thinner than I expected the 10Guage to be. I thought I wanted these. In the end I know I wanted a way to quick disconnect everything the panels and the battery. My panels have MC4 plugs. So my husband was kind enough to make a Y conversion for the two 50 watt solar panels I have together to an Anderson. So now I just need to disconnect the Andersons on both ends and pretty much close the home made pack cloth book case style flexible solar panels up and roll the battery out of bad weather etc. No longer stuck trying to use special tools to unlock the MC4's. SO with having said that...buy buy brand new Windy Nation 30 foot pair. I guess I'll attempt to sell on Amazon. We checked out the single cable with the double wires inside and conversions with both panels and it's all good to go. Since I camp solo a lot without my husband and rare occasional girl friend or guests .... I have to act fast if the weather changes or just easier to deal with a quick system over the MC4's. Of course the MC4's are popular for good reason in the home residence use but on the road is where I was having issues. I do wish someone sold a commercial well made version of what my husband just made me. It took him a good day to build and even then he realized he switched a plug around. We Know it's positive but someone messing with it for some reason and not us...yeah..I will label it with some red electricians tape to help with that.Wire is very stiff, not much flexibility, wants to recoil on itself. Could use a more flexible wire like used in an extension cord. Otherwise seems like a solid product.They are well built but the wire seems to be more like 12gage then 10 gage comparing to Synology wires ? I will have to run tests to see if they perform identicly...The wire is of great quality...I've used it to wire up my DC fridge to my solar system.Thought they were expensive for what they are. Not very impressed with the quality.Looks sturdy! Perfect for my type of use!