Check the listing for details. Aluminum Retainer Nut for 48 and 68 Ounce Blender Containers Compatible. Color: Silver, Condition: New. Listed at 15.99 USD. Retainer nut replacement with O-Ring fits most 48, and 64 Ounce Blender Containers Vitamix blender jars. Our Aluminum retianer nut is a light weight replacement for most Vitamix Blenders. The blade shown in picture is NOT a part of product. Usage: lock the blade in the blender, so that blade could spin in high speed. If you install this lock nut and you still have a leak, you must replace the O-Ring Gasket on the blade. Retainer nut replacement with O-Ring fits most 48, and 64 Ounce Blender Containers Vitamix blender jars.Our Aluminum retianer nut is a light weight replacement for most Vitamix Blenders.The blade shown in picture is NOT a part of product.Usage: lock the blade in the blender, so that blade could spin in high speed.If you install this lock nut and you still have a leak, you must replace the O-Ring Gasket on the blade.SHIPPING - Our standard shipping is always free. - All shipments with tracking numbers are sent out within 1 business day (Mon-Fri) except holidays. - Please make sure your ship-to address is correct. - Delivery date by eBay is estimated, and not guaranteed. RETURN - We stand behind our products. If you are not happy with your order for any reason, returns are accepted within 30 days from purchase. - Item must be in its original condition. - Please allow up to 3 business days for your return to be processed after it is received by us.