... or Serrated Steel Bar:25x5,30x3,30x5,40x5mm Pitch:30,40,50,100mm HDG Shengyang steel grating (Professional Factory) produce three ... , 32 x 5 x 3, 38 x 5 x 3, 40 x 5 x 3, 50 x 5 x 3, 50 ... etc, also be according to client's requirement and 30, 40, 60mm are recommended, America standard is available :1'' x 3/16 ...