The Paterson System 4 35mm Developing Tank is a high-quality darkroom equipment designed for developing both black and white and colour films. Made in the United Kingdom, this multicolor tank features a spiral design and is compatible with various film types. The tank is designed by the reputable brand Paterson and provides a reliable and efficient way to process your films in a darkroom setting. With a focal length of 135mm, this developing tank is a must-have for any film photography enthusiast looking to achieve excellent results in their darkroom.