goodsense greenhouse is mainly made up of aluminium frame,clear pc hollow sun sheet and many other accessories.with constant improvements and perfections,three main greenhouse series of ours available,including large-sized series,medium-sized series and cold-frameseries,which is expanded to be many series,such as barn series,popular series,traditionalseries,wall&lean-to series,patio&toolhouse series,cold-frame series,ect,and galvanized steel base and aluminum stagings are you options.so we are very sure that such a large wide range of garden products will always suit your demands.