This superb growhouse is designed to protect tender young plants and produce early bumper crops toughened safety glass panels provide weight to withstand high winds whilst ensuring excellent light transmission and superb ventilation includes two versatile seed tray shelves which are height adjustable british made with a 25 year guarantee on the aluminium framework dimensions 4 0 40121m41 x 2 2 40065m41 x 2 8 40082m41 high model fb3