The original type phenolic spacer and gaskets used on the NK ti's and the 1600/2002 ti's.  You will receive 4 spacers and 8 gaskets with the Double Sidedraft order and 6 spacers and 12 gaskets with the Triple Sidedraft order.  Please select 40 or 45 mm depending on your Weber/Solex/Delorotto/. . .  carburetor barrel size and whether you have single, double or triple sidedrafts.