The Big 3 Electric Propagator offers three large vented trays. A constant, automatically controlled temperature, evenly distributed throughout, to keep the compost at the optimum temperature for most seeds and cuttings! The Big 3 Electric Propagators base is tough and durable, and the propagator comes complete with vented lids for individual control. Size 80.5cm (31&189;"") x 41cm (16"") x 20cm (8"") high. 50 watts.