In this tutorial you will create this part using loft feature
1. Click New. 
Click Part, 
OK.
2. Click Top Plane and click on Sketch.
3. Click Circle, 
sketch a circle start at origin. Click Smart Dimension, 
click on circle and set dimension to 1 in.
4. Exit sketch. 
5. Click Top Plane 
and click Features>Reference Geometry>Plane. 
Set distance to 1 in apart, set # to 2 and OK. 
Two more plane added, click View Orientation>Isometric
Plane 1 and Plane2. 
6. Click on Plane 1, click Sketch. 
7. Click Circle, sketch a circle start at origin. Click Smart Dimension, click on circle and set dimension to 2 in.
Exit sketch.
8. Click on Plane 2, click Sketch.
9. Click Circle, sketch a circle start at origin. Click Smart Dimension, click on circle and set dimension to 1 in.
Exit sketch.
10. Click Features>Lofted Boss/Base 
click bottom circle, middle circle, top circle
and OK.
11. Hide Plane 1, 
hide Plane 2. 
12. You’re done.
