This is a beautiful heavy duty foam lined carrying case for just about anything that will fit inside. I bought a pair of them to carry big Losmandy HGM200 mount RA and DEC sections but they were JUST a little too small :-( Would be perfect for AP 900 mount or just about anything that will fit inside. I will post actual dims later this evening. New these were $400 each and the quality shows throughout. I'm offering here at 1/2 price ($200 each). Many thanks for consideration!