Product picture - Photographers' Formulary Wimberley's WD2D Pyro-Metol Developer for Black & White Film - Makes 4 Gallons 16 Liters Photographers', Formulary, Wimberley's, WD2D, Pyro-Metol, Developer, Black, &, White, Film, Makes, 4, Gallons, 16, Liters Click the image to close this page