Black Double Wel Straight Threaded Stem Connector Casters. Features double wel with 2inch in diameter, design with threaded stem connector Threaded Stem Connector Caster made from plastic wel with metal holder to prevent corrosion. Threaded stem connector size: Approx. 3/4" Tall x 3/8" Diameter Wel diameter: Approx. 2inch. This Twin-wel Chair Caster can be equipped in chair, quite great replacet; It is widely on everything from office chairs to porle equipt, small machinery, trolleys and rack, etc; T 2inch Wel Chair Caster can be on low-e carpeting, chair mats and all hard floor surfaces; Black wels with a dual escalator raceway system balances t load evenly for smooth swiveling and effortless rolling; Econocal, long lasting Black Threaded Stem Caster can be on most office chairs as a porle equipt; Color: Black; Material: Plastic + metal Weight: 81.2g; Package content: 1 x Twin-wel Chair Caster :Light and different displays may cause t color of t item in t picture a little different from t thing. T measuret allowed error is +/- 1-3cm. Black Double Wel Straight Threaded Stem Connector Casters. Features double wel with 2inch in diameter, design with threaded stem connector Threaded Stem Connector Caster made from plastic wel with metal holder to prevent corrosion. Threaded stem connector size: Approx. 3/4" Tall x 3/8" Diameter Wel diameter: Approx. 2inch. This Twin-wel Chair Caster can be equipped in chair, quite great replacet; It is widely on everything from office chairs to porle equipt, small machinery, trolleys and rack, etc; T 2inch Wel Chair Caster can be on low-e carpeting, chair mats and all hard floor surfaces; Black wels with a dual escalator raceway system balances t load evenly for smooth swiveling and effortless rolling; Econocal, long lasting Black Threaded Stem Caster can be on most office chairs as a porle equipt; Color: Black; Material: Plastic + metal Weight: 81.2g; Package content: 1 x Twin-wel Chair Caster :Light and different displays may cause t color of t item in t picture a little different from t thing. T measuret allowed error is +/- 1-3cm.