A plate is a flat part made out of composite materials, i.e., a resin and a reinforcing fiber. The mechanical properties are different than for normal isotropic plate because it has different material properties in different directions. Sandwich panels on the other hand are plates that sandwich some core material, generally a foam or honeycomb structure. These types of panels are lightweight, strong and offer incredible stiffness. Most of the products we offer are available for shipping within 24 hours.