Our brand names are recognized globally including: BSC Filters, York, UK; Criteria Labs, Austin, TX; Dow-Key Microwave, Ventura, CA; Pole/Zero, West Chester, OH; Espy, Austin, TX; and K&L Microwave, Salisbury, Maryland and Dominican Republic. Our expertise is the design and manufacture of communications-based specialty products - engineered components and subsystems - for demanding military, space, commercial aerospace/industrial, and telecom infrastructure applications where function and reliability are crucial.