Made of eco flex a non-toxic recycled plastic-wood polymer composite material that wont warp crack or split. Spindles made of stainless steel tubing and a stainless steel latch double latches on large and x-large crates. Easy no-tools assembly. For dogs up to 100 lbs. Crate is not chew proof designed for dogs that are familiar with crates and are less likely to chew. 43" L X 28" W X 31" H.