Process upgrade: We have designed a bottom anti drop function specifically for this dishwasher and two 304 stainless steel support wires were added at the bottom, and one 304 stainless steel support wire was added at the back to effectively prevent dishes from falling onto the dishwasher arm during the cleaning process, thereby avoiding damage to the dishwasher arm. Quality Upgrade: W10728159 lower dishwasher rack is 22" deep by 20 1/2" wide (side to side). Without the wheels it is 6" high. W10525645 dishwasher lower rack adopts mature 304 stainless steel production process, better wear resistance and high temperature resistance. Other products use a poor process, resulting in poor high temperature resistance, easy deformation and bending. Replacement lower rack: W10728159 dishwasher lower rack fit for Kitchenaid dishwasher bottom basket, also intended for Kenmore lower rack.