Latham ST8130 8' White Roman 4 Tread Thermoplastic Straight Bullnose Step Only. Latham’s strong, sturdy thermoplastic in-wall step adds functional beauty to your pool. Our unique brace system creates a stable, solid step. The thermoplastic surface will never delaminate, splinter, corrode, or puncture. Our wide variety of steps provide you with many choices for steps to enter your pool, built-in lounges, and even a sunledge for a comfortable place to gather.