Note: 1-3/8” diameter 10' 6" top rail poles are not included. All our frame kits are designed to hang the net inside the frame to avoid ball bounce-back. The EZ UP DOWN Batting Cage Frame Kit was designed by us here at Jones Sports. It is an excellent, well-thought-out design. I think you will like it as much as we do. This kit has everything you need to assemble the frame except for the poles. This batting cage is #24 twine size 42-ply high-density polyethylene (HDPE). It has 148 lbs. of tensile strength. Weather and UV protection are embedded during extrusion, not a coating that will flake off. This cage is good for light commercial or middle school use and can be expected to last 4 to 6 years. All Jones Sports batting cages are square-hung, which is stronger and lasts longer than diamond-hung mesh batting cages because impacts are spread over several meshes. The mesh size is 1.75". Returned items may be subject to a 20% restocking fee.