8 Watt Carbon Fibre Heating element contained in the rigid plastic base. Tough, shatter-resistant, clear cover with two adjustable ventilators. Grow different varieties of seed at the same time. Clear covers in flexible, shatter-resistant material. Unit can be used year after year. Will provide rapid and strong plant growth. Fast germination - soil kept at the optimum temperature for germination (15-20 Degrees C / 60-70 Degrees F). This Propagator is a non-thermostat model, it is designed to be either On or Off only. L38 x W24.5 x H19.5cm.