ROOT!T Hobby Heat Mat for Seed Trays - Large 120cm x 40cm FREE POSTAGE - A quality electric heat mat to help your plants germinate. Has one coil heating element - 60W. Large size suitable for 4 standard trays 40cm by 120cm. £41.70 Quantity: at £41.70 each Add To Basket 0 in your basket View Basket Checkout A top quality horticultural heat mat from ROOT!T. Size 40cm x 120cm. 60 Watts. Suitable for four standard propagators, two large propagator or four standard seed trays. Warms root area to improve germination and rooting. Warms root area by between 5 degrees and 11 degrees over ambient temperatures. Fully waterproof. Durable and fray proof. Suitable for rugged and damp greenhouse environments.