Hi. Jan, This is floor spring, do you still remember at the beginning, I have introduced you the function of floor spring. Why you put a floor spring here and make a comment of one star. By the way, We did sent the product our in time, why also comment us one star. If for the shipping time reason, we also pushed the agent and explained it to you before, the reason is beyond our control. One star is a very negative comment for our hard work and enthusiasm