Lightweight PVC construction. Screened vents prevent pests. Full zipper closure and ample ventilation. Open bottom for placing on top of existing plants. Hose adaptor vents. Dimensions: 48W x 48L x 34H inches. Additional features:Medium size seedhouse for maintaining eight seed flatsOptimum environment for germination and developmentQuick and easy assemblyPeak height: 34 inchesDoor dimensions: 32W x 33H inches The FlowerHouse SeedHouse Portable Seedhouse easily folds for compact storage when not in use. When the planting season starts it pops back up quickly to get your seeds germinating and off to a productive year. Designed with pest-proof ventilation and durable Gro-Tec material. Assembles in 30 minutes or less.This greenhouse is designed to with stand high winds not exceeding 60mph.