Compatibility: The 3.94 gasket is compatible with Ninja Bullet Blender Blade Assembly. Models listed below: BL480, BL480D, ( NOT for BL480-70, BL480W-70), BL486CO, BL486CO-30, BL487, BL487A, BL487T,BL487T-30, BL488W,BL490, BL491 BL492, BL492W, BL640, BL640-30, BL641, BL641C-30, BL680, BL680A, BL681A ,BL682, NN100, NN101, NN102 CT680, CT680SS, CT680CO2SS, CT682SP.