This is a single 17-11/16 inch center-to-center stainless steel ladder tread designed for residential ladders. This is an older style S.R. Smith tread replacement. The tread is constructed of 304 stainless steel and is sold without hardware. If you require hardware, order item #AQ5006 (3/8 x 3-1/4 inches).
Our ladder tread width measurements are from center to center. Please measure the center-to-center dimensions of your rails before ordering.