1.Galvanized Serrated Steel Grating 2.Material: stainless steel 3.Standard:ASTM 4.Bearing bar:30 x3mm 5 ... "x1/8",1-1/4"x3/16",1-1/2"x3/16",2"x3/16",2"x1/4".3.Bearing Bar ... .5mm,15mm,24mm,25mm,30mm,30.16mm(1-3/16"),32.5mm,34.33mm,35.33mm,38mm,40mm,41. ... Pitch (center to center):12.5, 15,25, 30, 30.16, 32.5, 34, 40, 41.25, 45, 50, 60 ... available <1'' x 3/16'', 1 1/4'' x 3/16'', 1-1/2'' x 3/16'', 1'' x 1/4'', ...