3" x 1-1/4" Black Polyurethane Wheel Swivel Caster with Brake - Select Expanding Stem Size - 300 Lbs Capacity

3" x 1-1/4" Black POLYURETHANE WHEEL EXPANDING STEM CASTER WITH BRAKE - Part #: 8GS30KP-PLY-EXP Polyurethane on polyolefin wheels offer more floor protection, non-marking treads, quieter rolling, & smoother rides compared to steel or phenolic wheels while still providing comparable load capacities. These polyurethane on polyolefin wheels are going to be the most economically priced of the polyurethane wheels and great for general industrial applications. These wheels can be used in most applications, but are not recommended for hot or cold applications, or when left in direct sunlight for most of their use. SPECIFICATIONS: Load Capacity (lbs.): 300 Link to Replacement Wheel: QPLY3J3 Wheel Diameter: 3" Caster Rig Color/Finish: Silver Zinc Tread Width: 1-1/4" Swivel or Rigid Caster: Swivel  Wheel Type: Polyurethane Swivel Radius: 3-7/8" Wheel Bearing Type: Ball Swivel Construction: Hollow Kingpin Overall Height: 4-1/8" Temp Range:  -40˚ to 180˚F  Stem Type: Hollow Kingpin Wheel Durometer: Shore d 60 (+/-5) Stem Size: Various up to 1/2" Wheel Color: Black  Clinched Hole Size: 1/2" Weight: 1.25 lbs. How to Install Expanding Stem Casters Squeeze element by holding bottom of stem (with a wrench, or by hand in some cases), and twisting the top nut.  This will bring the top nut down and cause the rubber element to bulge out. Check to see if caster stem will slip into hollow leg.  It should be hard to push into the leg.  If it slips in too easily, then you may need to squeeze the element again as described in step one. Once snug in place in the leg, the friction should keep the element from slipping while you tighten it a little more.  The caster should now be securely in place.  This procedure will work for both round and square legs. PICTURE PART# (Click to buy) FITS I.D. SIZE   E9 3/4" - 25/32" E11 7/8" - 29/32" E13 15/16" - 1" E15 11/16" - 11/8" E17B 13/16" E19C 13/8" E19A 11/2" E21 13/4" - 113/16"