Features and Benefits Build your own shelving! Just add straight cut 2x4s no miter cuts needed All hardware included Make it any size you want up to 8 ft long High density resin shelf links create a sturdy shelving system for garage workshop or home You can determine the size and configuration just add 2x4 legs to the Shelf Links to make functional and custom shelving in any length height and configuration. Made of structural resin. Can support spans up to 8 foot. Includes ShelfLinks hardware and instructions. LUMBER NOT INCLUDED.