[Packing Include] : 2 x Resealable Cup Lids with Rubber Seal Build-in and Extra 4 x Seal Ring Gasket. [Size] : Cup Lids Size: Inner size approx: 3.15Inch, outside diameter: 4.13Inch. Seal Ring Gasket. Size: approx. 3.7 inches, the inside diameter is approx. 3.3 inches [Compatible Brand]: Compatible with NutriBullet Cups: 18oz (Short), 24oz (Tall), 32oz (Hugr) Mugs; Compatible with the 600W and Pro 900 High-Speed Blender System. [Please Note]: These Cup Lids are NOT Compatible with Other brand blenders. [Premium Quality] High-Quality parts Not OEM, BUT QUALITY IS THE SAME AS THE OEM STANDARDS. Design improved for more durability, Stable. Easy to Install. WTPLY is a company that provides high-quality products at the most competitive prices. [Enjoy High-Quality Service] We think Customer satisfaction is our priority; So if you are not completely satisfied you can ask for a replacement or full refund, whenever you purchase our product. If you have any problems, feel free to contact us! Disclaimer All product names, brands, logos, and or other trademarks within our sales information are used to simplify the identification of the proper parts for electrical appliances. None of the companies or trademarks affiliate with, endorse or sponsor us or our products.