Bathroom Glass Door Runner, Sliding Shower Door Roller Wheel, Atoplee 4 Pcs Product Details 1. The Shower Door Rollers is made of copper + POM wheel, and the screw is made of stainless steel, which is corrosion-resistant, rust-proof and has good comprehensive performance. 2. The Shower Door Rollers has strong bearing capacity and good stability; the friction coefficient is small and the mute effect is good. 3. Easy to install, often used for bathroom glass sliding door pulleys/rails. Roller wheel diameter:19mm Comes with screws, suitable for 4-6mm thick shower doors. Roller wheel inner hole: 4mm, fixed with M4 screws. Roller wheel thickness: 4.8mm, Package included: 4 pcs Shower Door Rollers Runners Wheels Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.