Check the listing for details. Catlinbread Formula 5f6. Condition: Used. Listed at 79.00 USD. The Catlinbread Formula 5f6 is a high-quality overdrive pedal designed by Catalinbread. Known for its warm and rich tones, this pedal is perfect for creating that signature distorted sound that musicians love. With its unique blend of vintage and modern features, the Catlinbread Formula 5f6 is a versatile addition to any guitarist's pedalboard. Whether you're looking to add some crunch to your clean tone or take your distorted sound to the next level, this pedal is sure to impress with its exceptional sound quality and performance.