[PREMIUM QUALITY] Outside diameter: approx. 4 inches / 10 cm, Inside diameter: approx. 3.75 inches / 9.5 cm, 6 mm thickness. Made of high-quality silicone, BPA-free, non-toxic, dishwasher safe. [COMPATIBLE WITH] Fits NutriBullet Pro 900w high-speed blender/mixer system. Not compatible with Magic Bullet, NutriBullet RX, Baby Bullet blenders, or Nutri Ninja Pro 900w. Please confirm your model before purchasing. [PERFECT SEAL] Durable and elastic gasket provides a reliable seal and long service life. Easy to install and clean. Ideal replacement for original parts. [ATTENTION] 1. The gasket is designed with a lip to fit NutriBullet blenders that have a corresponding lip. It will not fit models where the gasket seat does not have a lip. 2. If the gasket feels tight initially, try soaking it in hot water. As with any NutriBullet replacement part, wash with soap and water before first use. Material: Silica gel Color: Grey Package Contents: 6 x Sealing ring Note: Light shooting and different displays may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.