Cheaper to buy your springs somewhere else.I ordered the bed lift kit for a king size bed. After installing as per the instructions, I realized that the gas springs included in the kit are oversized. (I have a typical bed platform with a pillow top mattress) The sales representative for this company unfortunately couldnt offer me a full refund.I did my own math and it appears the kit is oversized by over 150lb of force with the included springs. I brought this to the attention of the company hoping theyd honor a full refund due to this fault in the kit design, but they wouldnt.