This is a quality, heavy duty table for home use made in Germany. It features 7/8" ALU-TEC climate-Control aluminum underside to control expansion/contraction due to weather changes for outdoor or indoor use. Patented smooth center guide safety-track folding mechanism - Position control tracking. All outer edges are protected & supported by a 1" aluminum channel ap0ron. Space Saver Technology with low center of gravity for compact storage and easy transport. Folds for storage. 4 1/2" dual wheel casters, two with integrated locking system. 1 5/8"oval steel tubed legs with synthetic powder coating to guard against corrosion and surface scratches.