The PCN 142981 strip heater is also known as model SSNHM-21 with these features: 240 volts, 600 watts, A=21.13 inches, B=20.38 inches, and D=19.63 inches. The overall width of these heaters is 1-1/2", and the height with terminals is 15/16". These type S strip heaters are 3/8" thick with a Monel sheath enclosing the ceramic and internal heater coil. There is one #10-32 terminal on each end of the heater. These bar heaters come standard with two slots (one on each end) measuring 5/16" by 1/2". They can be ordered without the slots for an additional cost. The in stock strip heaters usually ship in 3 or less business days.