This #42 twisted poly cage is our strongest and most durable poly cage. The knotted twine withstands direct impact usage better. Excellent for outdoor applications. Twisted, knotted #42 twine, hung on the square for a clean look Higher abrasion resistance than braided poly Treated for UV protection. Will not shrink or absorb water Border ropes stitched to the net - secures cage, holds form, and reduces interior netting wear Center rope supports ceiling of cage Three 6" tie lines at each ceiling end of the cage 6" tie lines at each bottom corner of the cage