The phrase "grade materials" refers to categorizing or classifying materials based on their quality or suitability for a specific purpose. Full definition
A new pattern has been introduced to decrease reflections and brighten dashboard surfaces, while high grade materials such as real aluminum and wood grain are applied to the center console. (thekoreancarblog.com)
They make each mattress core and surface with food grade materials, in fact 100 % of it is! (safbaby.com)
They are made from a durable, high - density military grade material for extra strength, but are thinner for quicker freeze and thaw times. (evenflofeeding.com)