O/a dim 11.00 in. Lg, 4.50 in. Deep, 7.75 in. H- c/o two aluminum-housed units mtd on common base- heating unit c/o aluminum block bath, 2 heaters, thermometer well, accommodates tubes w/max diameter 35mm and min length 160 mm- adjustable condensor w/coil of 0.25 in. Copper tubing- temp range of ambient to 300 degrees c- 115v, ac, 50 or 60 hz, 150 watts