The piece without insulation is 35, with insulation it's 40. Delivery is available within the city for orders of more than 6 pieces, and delivery is available outside the city for orders of more than 50 pieces. There are 2 types of wood: light and strong, and insulation that prevents water and dust from entering, meaning it is (insulated from the back). There is a technician for installing the decor. Delivery is available.