Plastic Wheel Adapter - RED - Adapt a grinding wheel to fit your spindle. Plastic Bushings are: a.) 1 1/4" x 1" x 11/16" b.) 1" x 3/4" x 11/16" c.) 3/4" x 5/8" x 11/16" d.) 5/8" x 1/2" x 11/16" The grinding wheel in the picture is for demonstration purposes only, it is not for sale. I am only selling the RED wheel adapter. The wheel in the picture is showing the red adapter being used to change the ID from 1 1/4" to 1/2". The bushings can be used in unison with each other to convert to many different sizes, convert 1" to 1/2" change 1 1/4" to 3/4" change 1 1/4" to 5/8" you can mix them for your needs.  The width (length) of the bushings is 11/16".