The Hobby/Grand Gardener Rion Base Kit was engineered to provide additional stability or additional head room for Rion Greenhouse sized 8' x 8'. Manufactured with heavy duty 100% UV-protected resins and engineered with a U-shape, honeycomb design for extra durability. Filled with soil this base kit provides a solid foundation that improves stability and durability against strong winds. The Base Kit can also be used to provide an additional five inches of head room or additional growing space. Like all Rion products, the Base Kit assembles in a snap.