Steel hot rolled commercial quality pickled and oiled; white enamel; 9.500 diameter x 0.125 thk; bar 4 lg x 1/2 w x 0.375 thk welded; center aperture 8.250 lg x 4.250 w notched 1.000 radius 1.75deep one long side and cutout 2.750 lgx 0.500 deep opposite notch; 3 holes 0.3125 dia