The Paterson 12x16" Developing Tray is exclusively designed to hold print sizes up to 11 x 14".It is made of tough, chemical-resistant plasticThe base design of this plastic developing tray enables minimum usage of the developing solution and easy removal of the printAlso, the lip of the tray allows drip-free pouringThis developing tray comes in 3 different colors, which make it easy to differentiate between chemicals when used under safelight conditions