This listing is for a NSF Certified 3 inch Threaded Stem Caster with a 3/8"-16 x 1" Threaded Stem combined with a high quality non marking Polyurethane Wheel. This is great for dollies, furniture, display stands, racks, shelving, carts, food service, and many more applications. These are some of the highest quality 3/8" Stem Casters on the market. We have these fully stocked in our Texas warehouse ready to ship the same day. For more specifications and measurements on this Caster please click on the Technical Specs tab above.