The aluline dog crate is an aluminium plastic composite transport box and is a safe and comfortable way to transport your dog when travelling by car this high quality crate is strong durable and very light it is made from a premium aluminium plastic composite and is waterproof it has rounded edges preventing injury or damage to your car while moving the crate the door is mounted on sturdy safe hinges made from plastic it can be locked with a key and has little rubber nubs so that it shut