The thule rapid system square bars are a pack of two roof load bars traditional square load bars constructed from durable strong steel with black plastic coating the thule bars are available in 4 different lengths so you can get the best fit for the width of your car the thule rapid system square bars fit all thule rapid system load carrier feet thule 951 952 953 the thule rapid system square bars features pack of 2 100 kg max load available in 5 lengths for perfect fit to the width