comparably hard and rigid material having a forwardly facing concave surface hidden and a rearwardly facing convex surface 1131 two of the flexible polyurethane block members 1103 are secured at their forward ends to the rearwardly facing surface 1131 of each snow plow section 1125 about midway between the upper edge thereof and the lower edge thereof and are secured at their rearward ends to the upper horizontal bar 1108 two additional flexible polyurethane block members 1103 are secured at their forward ends to the rearwardly facing surface 1131 of each snow plow section 1125 near the lower edge thereof and are secured at their rearward ends to the lower horizontal bar 1110 the flexible polyurethane block members 1103 are secured to the rearward facing surface 1131 of the moldboard 1100 by upper and lower mounting plates 1107 a 1107 b which are secured to the moldboard and by upper hidden and lower capture plates 1109 which receive the forward end of the flexible polyurethane block members 1103 between the mounting plates 1107 a 1107 b and capture plates 1109 the forward end of each flexible polyurethane block members 1103 is thus sandwiched and held in place to the back of the moldboard 1100 by securing a bolt through the mounting plate the flexible polyurethane block and the capture plate the rearward end of each polyurethane block members.