The Omega Universal Developing Tank can be used for black and white as well as color film processing. It also develops reversal films that require second exposure while processing. The tank body is impact and heat resistant. The lid tightly fits on to the tank to prevent water from seeping in. Along with the tank, you get two adjustable multi-format spiral reels. These self-feed reels allow you to develop two 135mm or 126 films at the same time. You can put one roll of 127 film cartridge along with 120 or 220 format films.