Please note that B0F13QD3XH (8 sets trampoline curved poles with plastic T connectors?and B0FCS1KCJX,B0FCRWBFKW( trampoline fiber glass rods for plastic T position) models are compatible, you can buy together; Specifications: Material: fiberglass rod Color:Black Packing List: 8 x trampoline enclosure fiber glass rod Before buying, please check your frame size 12FT means the trampoline frame size, not the top ring size; the top ring size normally smaller than the frame size. The pipe connectors already pre-installed on the rods.