Autogrow® Thermostatic Warming Units supply just the right amount of controlled warmth for your needs. They are equally suitable for use in air or soil so you could, for example, make a propagator with a bed of warmed sand for use in Spring and Autumn. Or remove the unit from the soil, fit around the walls of a glass topped case and use it for overwintering your favourite plants. Complete mains lead and moulded fused plug.   Warming Unit Product Code     Watts     Prop Area Bottom Heat (Sq. M.) approx     Glass Area Air Warm (Sq. M.) approx     Length (M) Approx     Cable Only Product Code   T37 37 0.30 - 0.45 0.1 - 0.4 3.0 M37 T75 75 0.65 - 0.85 0.4 - 0.7 6.0 M75 T150 150 1.20 - 1.60 0.7 - 1.0 12.0 M150 T300 300 2.50 - 3.10 1.0 - 2.2 24.0 M300 T600 600 5.10 - 6.20 2.2 - 4.3 48.8 M600 Each Thermostatic Warming Unit consists of an Autogrow® C5 Rod Thermostat and Soil Warming Cable. Cables are also available separately.