2 Dead Centers And 2 Lathe Dogs. The Larger Center Is A Number 4 Morse Taper, And I'm Guessing The Other Is A Number 3. The Larger Lathe Dog Is 1 1/2 Inch While The Smaller One Is 1 Inch. All Pieces Are Used And In Good Condition As Shown In Photos. Please Feel Free To Contact Me With Any Questions. I Just Found Another Dog With A 1 Inch Opening That Is Also Included. See Last Picture