This Filter / Air Cleaner Element is used  on a Midland Power Brake booster for 1967 -1968 Ford Mustang and the 1967-1968 Mercury Cougar, also fits select other select 1960's Ford Trucks ( f100-F350) 
This reproduction filter / Air Cleaner Element replaces the  obsolete ford item C3TZ-2A346-B
 
The Midland Filter is a critical component used in the midland brake booster spacer, designed to replace the factory foam filter. Crafted from durable, high-quality materials, this filter is built to withstand the rigors of daily use and provide long-lasting reliability. Its efficient design ensures optimum filtration and protection for your brake booster, helping to maintain its performance and functionality. With easy installation and a perfect fit, the Midland Filter is an essential part of any brake booster restoration project. Trust in the quality and durability of this foam filter to keep your brake booster running smoothly for years to come.