Lifetime 6415 Outdoor Storage Shed, 11 by 13.5 Feet Interior Dimensions: 120.5" W x 150.5" L x 79" - 110.25" H; Backed by a 10-year limited manufacturer warranty Includes 2 shatter proof windows and 2 screened vents that provide airflow and keep pests out; shelving system is customizable and steel reinforced High arched, steel-reinforced doors offer a 4 feet wide by 6 feet high door opening, lockable doors with internal latching mechanism High-pitched roof support a-frame trusses provide 6 feet 8 inches of head room and the steep roof allows for quick drainage of rain and snow High density polyethylene floor included does not crack, chip or peel; slip resistant surface with beveled edge and is resistant to oil and stains Include 2 shatter proof windows and 2 screened vents that provide airflow and keep pests out; shelving system is customizable and steel reinforced High arched, steel-reinforced doors offer a 4 feet wide by 6 feet high door opening, lockable doors with internal latching mechanism High-pitched roof support a-frame trusses provide 6 feet 8 inches of head room and the steep roof allows for quick drainage of rain and snow High density polyethylene floor included does not crack, chip or peel; slip resistant surface with beveled edge and is resistant to oil and stains Site selection your shed is recommended to be prepared using a level cement, wood asphalt, gravel or patio style surface for long-term performance Exterior Dimensions: 123.5" W x 153.5" L x 112" H Roof Dimensions: 132.75" W x 162.75" L Interior Dimensions: 120.5" W x 150.5" L x 79" - 110.25" H