This gasket has somewhat ridge or a lip. Made to final Compatible with 600W / 900W Extractor blades and Flat milling blades These gaskets are intended for those for NutriBullet blender with a lip Will now not match for NutriBullet blenders the place the gasket would not have a lip. These Gasket Replacements for NutriBullet 600W 900W blenders match on both for NutriBullet Extractor Blade or for NutriBullet Flat Milling Blade, or any of the lids. Colour:gray Material:plastic Size:Outer diameter: 9, within diameter: 8CM Package Contents: 8 * DURABLE grey gasket Only the above kit content, different products are usually not included. Note: Light capturing and diversified exhibits may cause the colour of the article in the photo a bit of diverse from the real thing. The measurement allowed error is +/- 1-3cm.