The Flic Film Ultrafine Precision Temperature Water Bath is custom built to fit four 500ml square bottles (included with the kit) and a Paterson/AP Photo Plastic/Ultrafine Tank (not included with the kit).
Guaranteed to hold the temperature to within 0.1 degree Celsius.
The units are built with smart tech thermostats and variable voltage heaters so that there is no oscillation around the target temperature. Now home color developing will be infinitely easier and you have one less excuse.