Bathroom Pan Glass Sliding Door Pulleys/Runners/Wheels, Strong Load-Bearing Product Details Package:8PCS x Shower Door Rollers(4xTop + 4xBottom) Roller diameter 19mm /22mm/23mm/25mm/27mm The rollers are suitable for the glass with at least 12 mm hole.Shower Door thickness :4-5mm Material :POM+AL Alloy+Ball Bearing Steel+Nylon Strong Load-bearing Capacity, Ultra-quiet After you choice which diameter you need. after order you can give us a message We are factory and good prodcues and good price if have any need just write to us Package:8PCS x Shower Door Rollers(4xTop + 4xBottom) Roller diameter 19mm /22mm/23mm/25mm/27mm The rollers are suitable for the glass with at least 12 mm hole.Shower Door thickness :4-5mm Material :POM+AL Alloy+Ball Bearing Steel+Nylon 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.