Thank you for viewing my item!    Available is a vintage Special Dynamics Tracking Filter.    The item is for the model SD131.    The item has not been tested and did not come with a power cord, so is being sold as is for parts/repair.   The case measures approximately 19 x 19 x 6 inches.    It looks to be complete and in good physical condition.    Shipping will be UPS ground charges on 20 pounds in the US.    Outside the US will be calculated shipping charges on 20 pounds through global shipping program.