For a detailed description of the part/s & component/s please refer to my title and pictures and for the type of firearm please refer to my item specifics.The tube size is more than 1" in diameter.  Measurement for that is approximate.  Mounts are included.  WW1/WW2 post reticle (tube is over 1" dia.) scope CERTAR 4 1/2 CP. GOERZ BERLIN