This is a 50 sheet box of 5x4" Tri-X 320 TXP Professional Black and White film. Kodak TXP is an all-purpose panchromatic film for subjects requiring good depth-of-field and high shutter speeds, and for extending the flash distance range. Fine grain, high sharpness Medium contrast, moderate degree of enlargement.
This is a 50 sheet box of 4 x 5" T-Max 100 Professional. Kodak Professional T-Max 400 Film, now the sharpest 400-speed black-and-white film in the world, in addition to being the finest-grained.
The Kodak T-Grain Emulsion of this high-speed, highly detailed film gives you all the power needed to expose the true purity of any environment.