[Material]: Copper + stainless steel + nylon, bold copper shaft, wear-resistant, no rust and anti-corrosion, this gives the product more durability and longer service lifeFeatures]: Strong Load-bearing capacity, ultra-quiet,stable push and pull smoothly,less effort and safe to use[Application]: Suitable for most shower enclosures, shower cabins and steam cabin enclosures.Rolling smooth:Over the course of repetitive use,the original wheels on some aged,heavy wood closet doors might wear out and stuck.These wheels will keeping certain space from the mounting bracket and therefore fit nicely into the sliding groove.Now you can replac the rollers with these,they will slide like silk - almost no effort for them to move.The improvement is really unbelievable.Easy to control:With a build-in ball bearing so easy to use,it is so quiet almost feels like ice skating.You can control the drawer going exactly the direction you want it to go.Now you can say goodbye to the old days when you struggle with all strength just to get the drawer out,also don't have to be careful just in case you use too much force,now the corner cabinet is operating like new!Quality nylon:Some of your old shed door wheels had deteriorated and crushed?These replacement wheels are exactly what you need to fix it once and for all.They are made of nice nylon,the plastic roller surface is not too hard or too soft,providing excellent support.Combining hubs made of solid brass,they will hold the weight of the door with ease.They will now roll as if they were gliding on air.A breeze to install:If the sticky bathroom door keeps annoying you,there no need to struggle all these time with it.Installation will only took minutes.Rod can passes through the roller's threaded axle hole with ease,then screw the rollers in place and levele the doors.The hardware will stabilize the wheel through the hole.As a result,the family members that use the shower are now jubilant.