Blendtec 40-310-SRV 6" Square Latching Lid for Wildside+ & Fourside Jars, Black
The Commercial Blender Parts by Blendtec: Latching Lid, makes air tight seal, used on jars with and without sound enclosures, fits both Wildside+ & Fourside jars, black, NSF (10 pack) ( Blendtec - 40-310-SRV )