Curity™ NonSterile USP Type VII Gauze Sponge, 3 x 3 Inch, 1 Case of 4000 Respiratory Tubing Replacement Caster 4 *Twin Style:1 Pair (Left & Right) Replacement Caster 4 *Twin Wheel Casters Have Threaded Stem For Extra Security And Safety *MJM's Exclusive Reinforced Caster System Allows Additional Structural Support To Our Entire Product Line Our Positive Engaging Lock Holds The Wheel Securely So There Is No Swivel Movement When Locked *The Unique Design Allows Easy Movement On Hard Surfaces And Helps Eliminate the Wheel From Falling Into Cracks *Soft Non Marking Tread (It Will Not Leave Black Marks Or Leave Groves In Wood Or Vinyl) *Quiet Mobility (Hard Treads Make A Lot Of Noise)*Non Rust Plastic Body And Wheels *High Load Capacity (160 lbs) *Non Slip Tread Men's Dress * Khaki * X Large * Shoe size 12 easier handling USP Type VII: USP means gauze sponge meets United States Pharmacopeial Convention standards