Whitmor Wheels for Whitmor Supreme Shelving Units - Heavy Duty Supports Up To 500 Pounds (Set of 4)

Will these fit 3/4 inch wire shelving poles?

What is the thread size on these wheels?

How much height do these add to a shelf like the 72 inch 6070-5264 supreme 5-tier shelving unit?

This is a question response reply, the posts on my rack are 1", but the insert area measures 3/8". are the insert measurements of your casters 3/8"?