4pcs  Heavy Duty Zinc Alloy Twin Top Bottom Shower Door Wheels Rollers Runners   Specification: material:zinc alloy、 nylon wheels Size:Diameter 23mm\/0.91" 、 25mm diameter\/0.98" Easy glide replacement shower door roller   Suitable for most shower enclosures、 shower cabins and steam cabin enclosures   Package included: 4 x Shower Door Wheels