4" x 1-1/4" Poly-Pro Wheel Swivel Caster Stainless Steel - 300 lbs. capacity Steel The source lists the lock

The source lists the lock or brake configuration as Top Lock

Buyers looking for 18 Ga CR Steel construction

Molded To Core This replacement wheel is listed with wheel diameter 6"

the mounting does not match the listed 2-3/8" x 3-5/8" plate with 1-3/4" x 2-7/8" slotted to 3" bolt-hole pattern

Sold in packages of 2

4" x 1-1/4" Poly-Pro Wheel Swivel Caster Stainless Steel - 300 lbs. capacity Steel The source lists the lockProduct Overview The poly pro wheel is one of our caster staples, providing plenty of durability with a firm tread. The polyurethane tread protects surfaces, and the annular bearings roll very smoothly. These wheels work best for indoor applications; for outdoor use, please take a look at our Polymadic wheel casters with UV resistant materials. Tread: Polyurethane, Non Marking, Mechanically Locked To Core This caster is listed with wheel diameter 4",