Root !t Heat Mat SMALL 25cmx35cm ROOT!T Heat Mats offer uniform heating and avoid hot spots with their intricate pattern of fine wire; you'll find instructions printed on the mat so they can never be lost and there's a size to suit every growing situation - you'll fit two standard seed trays on the 40cm x 60cm medium sized mat and the large - a jumbo 40cm x 120cm - will accommodate four seed trays. • Medium is 40cm x 60cm • Medium holds 2 seed trays
