High imaging quality: With arch cover and special made high elasticity sponge pads, when the cassette is closed the arch cover will squeeze the air out between the screen and the X-ray film, the therefore, enable the screen to contact the X-ray film closer. Light and sturdy: Cassette´ S structure is unique. The frame is made of special Aluminium-alloy shape and special plastic angle connectors, the surface is made is strong aluminium plate. It is sturdy and durable. Easily operated: With the automatic locking system, it is easy to open and close, and the working efficiency is higher.