This turret is designed for larger telescopes.Dims. are 6.250 inch hex. X 5.625 Lg. The Wt. is five Lbs. The eyepiece holders accommodate Six two in. eyepices. Four 2 in. to 1.250 in. reducer compression ring adapters are included in case you want to use four 1.250 eyepices. Internal spring loaded click stops assure accurate optical path alignment. The turret attaches to the S.C.T. telescope by meanes of a standard 3.250-16 tpi thread. Six dust caps are included. Instructions are included for mounting on meade/celestron schmidt cassegrain telescope visual backs. The turret was purchased from Van Slyke Eng. on march of 2000. It is in like new condation. I paid $1925 for the turret. I am willing to sell for $998, I will pay for the shipping.