30° side slope and 40° end slope on the gravity box. Heavy duty bracing on slant side of box and rigid internal box reinforcing braces. Rocking bolster is standard on gravity box. A 40n (365 Model), 48' (450 Model) wide door opening. T x 12' grain viewing window. Center dump chute for pit unloading. Light kit consists of two 4' amber lights and two 4' red lights for added road safety. Front mounted ladder. Heavy duty running gears. Heavy duty spindles rated for full capacity. Rear mounted SMV sign is standard. Transport safety chain. 2 wheel brakes on 450 models.