Heavy gauge aluminum design features a fluted dome-shaped top to reduce the likelihood of turned ankles when stepped on. Held in place by 1/4″ needle spikes or by optional 3″ plated pins placed into sleeves inserted into the track. Raised 1/2″ off the track surface for rapid drainage. Curbing design has been upgraded to included inserts at the joints of the curbing. Each section is milled to allow easy drop in or removal of corresponding sections.