[PREMIUM QUALITY] Outside diameter: approx. 4 inches or 10 cm, Inside diameter: approx. 3.75 inches or 9.5 cm, 6mm thickness, of High Silicone, BPA- , , Dishwasher Safe.[COMPATIBLE WITH] Fits for Pro 900w high-speed blender or mixer system, NOT Fits for , RX, blenders and Nutri Pro 900w. Please confirm the model before purchasing.[PERFECT SEAL] The gasket is durable and elastic, providing a good seal and a long service time. Easy installation and cleaning, ly match and good choice for direct replacement of original parts.[ATTENTION] 1.Please note that the gaskets are designed with a lip which FITs for blender with a lip, will NOT FIT for blenders which the gasket doesn"t have a lip. 2.Please try soaking in hot water if the gasket seems too tight at first. Like any for Nutri replacement parts, wash with soap and water before using.Material:Silica gelcolour:greyPackage Contents:6 x ing ring the above package content, products are not included.Note: shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. About shlpping: All items will be shlpped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.