NEW TetraTec Heaters New innovative construction. Range of popular 5 sizes, 50w, 100w,150w, 200w, 300w. All with temperature regulator that is easy to set. Easy to read temperature scale. Extra long mains cable on all sizes. (Over 2mtrs on 300w !) Electronic regulator for top reliability and safety. Control light. Extra thick heat and shock resistant glass tube. Double ceramic heating element to ensure better heat distribution. 2 year guarantee.