Kodak Tri-X 400TX Professional ISO 400, 36mm, Black and White Film (Pack of 3) Perfect for shots requiring a good depth of field, fast shutter speeds, or extending the distance range for flash picture Three Rolls of TRI-X 400 professional black-and-white, 36mm film World's best-selling black-and-white film Classic grain structure for low light and action Excellent choice for dimly-lit or fast-action subjects