The Skywalker 15' SQUARE Replacement Trampoline Part, Middle Tube, is an authentic Skywalker Trampoline part. Only replace the parts you need instead of replacing the entire trampoline. Using authentic Skywalker parts, you can be sure the parts will work with the parts you already use. Product Details: Trampoline Size:15' Square. Part Name: Middle Tube. Part Identification Chart: #2. Has 8 Holes to fit springs. Both ends are square. Fits Model: SWSAS1500. Length: 52"