Shower Door Rollers, Lance Home Set Of 8 Single Shower Door Runners, Wheels, Product Details Set of 8 Pcs Single Shower Door Rollers (4 upper rollers and 4 bottom rollers). These single shower door rollers fit glass shower doors where the distance from the center of the hole to edge of glass is 18mm. Diameter of the wheel: 23mm; Width of the wheel: 6mm. Minimum Hole size in the glass: 11mm. Maximum glass thickness: 6mm. Material: Plastic, Nylon, A Plastic, Nylon BS and stainless steel. Color: White and grey. Comes with screw cover caps. Spring loaded action can also fit curved showers. Designed with a nut and a plastic cover. Easy to glide and clean. Package: 8 pcs Single Shower Door Rollers (4 upper rollers and 4 bottom rollers). 1. Set of 8 Pcs Single Shower Door Rollers (4 upper rollers and 4 bottom rollers). 2. Material: Plastic, Nylon, A Plastic, Nylon BS and stainless steel. 3. Diameter of the wheel: 23mm; Width of the wheel: 6mm. Minimum Hole size in the glass: 11mm. Maximum glass thickness: 6mm. 4. These single shower door rollers fit glass shower doors where the distance from the center of the hole to edge of glass is 18mm. 5. Comes with screw cover caps. Spring loaded action can also fit curved showers. Designed with a nut and a plastic cover. 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.