toplimit 3" m10 3/8 screw 10 x 25mm office chair caster wheels smooth and durable & safe for all floors including hardwood - style w/universal fit toplimit <p><b>truly safe,scratch-free polyurethane casters for all floors</b><br> many customers ask if the caster wheels are safe for their floors.our question is absolutely yes,the old original caster wheels may cause big damage to floors,this is a serious issue.<br>our office chair caster wheels are made from crystal clear,soft polyurethane.this provides better combination of durability ,softness and sleek surface.<br>no longer scratch and mark on hardwood, laminate, tile,carpet,bamboo, pergo,vinyl plank and more. </p> <p><b> style wheels provides quiet working environment and smooth moving</b><br> daily busy work makes you move and move on the office chair,traditional office caster wheels would make noise ,it always interrupt colleagues.<br>these caster wheels will solve the problem,the soft material provides better ,silent contact on the floors,you could freely move ,it’s unnecessary to worry about disturbing colleagues.<br>the internal bearings are quick,you could enjoy smooth movement.</p> <p><b> fit for most office chairs</b><br>3" premium replacement caster wheels stem diameter is 10mm(3/8”),stem length is 25mm(1”),perfect for standard herman miller aeron chairs<br>big and tall executive office chair,noblechair epic gamer chairs,z-line chairs,basic mid-back office chair and more.</p> <p>specification<br> material:polyurethane<br> stem diameter:10mm/3/8"<br> stem length:25mm/1”<br>