Set of 5 Miracle Casters, 4 inch wheel diameter, excellent for carpet

Description

Set of 5 Miracle Casters, 4 inch wheel diameter, excellent for carpet
A complete set of 5 Miracle Casters. These used but in excellent condition and work perfectly.
I used these on a Herman Miller Aeron chair and they were great for carpet--far better than the stock wheels. I ended up getting a different chair so I am selling these wheels.
Model: MC78
Wheel diameter: 4 inches
Stem diameter: 7/16 inch
Stem length: 7/8 inch
Product description
Miracle Casters are large chair casters that offer several advantages over regular chair casters. Miracle Casters use wheels that are nearly 4 inches in diameter. That's twice the diameter of the cheap casters supplied on most office chairs! Because of their larger size, Miracle Casters roll easily over thick carpet and can also be used on tile. Think of the huge wheels on tractors and other heavy equipment. Miracle Casters work on the same principle. The bigger the wheel, the easier it will roll over a soft or uneven surface. Each caster is rated to carry 130 pounds, which means that a set of five will hold a static load of 650 pounds. However, for best results, we do not recommend Miracle Casters for individuals over 300 pounds. When used on carpet, each Miracle Caster is guaranteed against failure for 10 years. Miracle Casters fit many office chairs. PLEASE MEASURE YOUR CURRENT CASTER STEM TO MAKE SURE THE DIAMETER IS 7/16-INCH. A ruler, 7/16" wrench or 7/16" drill bit can be helpful when checking your stem diameter. The length of Miracle Caster stems is 7/8-inch. To avoid chair damage, your current caster stem should be between 7/8-inch and 1.25-inch in length.