Made of UV stable medium duty 16 gauge PVC vinyl in bright orange. Each has a welded eye strap on both the bottom and top of the mark to tie on lines. 24" diameter with a single inflation nipple with cap (pool toy type, but slightly larger). Features the APS logo on two sides at a phenomenal price!
Remember to leave your marks slightly under inflated to ensure they don’t rupture as the air inside expands. Damage can occur if marks are fully inflated on a cool morning then taken onto the water on a hot afternoon.