[PREMIUM ] Outside diameter: . 4 inches/ 10 cm, Inside diameter: . 3.75 inches/ 9.5 cm, 6mm thickness, Made of High Silicone, -Free, Non-toxic, Dishwasher Safe. [COMPATIBLE WITH] Fits for Pro 900w high-speed /mixer system, NOT Fits for , , Baby blenders and Ninja Pro 900w. Please confirm the model purchasing. [PERFECT SEAL] The gasket is durable and elastic, providing a good seal and a long service time. Easy installation and cleaning, perfectly match and good choice for direct replacement of original parts. [ATTENTION] 1. Please note the gaskets are designed with a lip which FITs for 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 at first. Like any for , wash with soap and water using. Material:Silica colour:grey Contents: 6 * Sealing ring Only the above content, other are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.