Wish I had found them sooner. Would highly recommend, if needing more than two kayaks on your rooftop, I would recommend a different system, yet for two kayaks this was an awesome purchase! The posts have 19 one inch holes that start 13 1/8? OC off the floor and are 3? OC apart. Definitely would buy again on first impression. The fins were bent and the rods were bent. The adjustable microphone carries fairly well, and the sound cancellation/base works fine with my Dolby Atmos surround. I strongly disagree. They are easy to put on like socks, squishy like fuzzy socks, nice and warm, and non-skid. Ive been meaning to write a review for some time now, but a recent encounter with an inferior, barely used cable has awoken me to write this review. I fit 4 pairs of my heels side by side as well as a pair of flip flops on one shelf.