Hard floor castors for office chairs. Attention: The stem size of chair castor which is suitable for most chair , please measure and confirm the connection pin of your old desk chair before purchase to that the size of the chair castors is suitable for your office chair. Silent office chair wheels - no floor protection mat required or office chair underlay: the soft surface of these replacement wheels for office chairs protects your floor and does not scratch, stain or damage your carpet floor. You can glide worry-free and safely on a of floors, perfectfor tiled, parquet floors, laminate, wood, marble, granite, stone, concrete or vinyl floors. Pleasant experience with chair castors for parquet - Our durable office chair castors for hard floors, precision and durable. This gaming chair can carry loads of up to 295 kg (650 lbs). Due to the excellent workmanship of chair wheels, chair almost silently in most situations, which offers you a quiet environment for learning or playing. Versatile gaming chair wheels - suitable for most office chairs and most furniture with mounting pins. Easy to install, you do not need to use tools, simply attach chair wheel to the mounting slot of your office chair or other furniture and you can have a office chair in just a few minutes. It is the perfect replacement wheels for gaming chairs, office chairs, noble chairs, study furniture, office chairs and other office furniture. size: Diameter 7.5cm Material: PU colour: Black Package Contents: 5 x Transparent caster Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.