Dimensions of the box are 6-3/8"length x 6-3/8"width x 4-1/4"deep. Enclosure is gray plastic.
No, they don't mix your chems. This is a selection box. You simply select the premixed chem you would like to use. This is nothing like a chem spider, this is a soap injection selector system for professional contractors out in the field that have employees. Every soap is a different color as you see here and all is very simple and self explanatory. All you do is cut your hose, push you hose onto the hose barb out of the bottom of the box and select which one you want.
I can customize any of the lettering or numbering but it will be an additional $25.00 for custom lettering and colors.