Features: Each package includes 4 adjustable floor jack, providing temporary or additional support to floor beams and joists, helping you carry out essential construction or repair work immediately. Featuring a galvanized surface, our house jack offers good resistance against corrosion and rust. This feature allows it to withstand harsh conditions and extend its service life. Its predominantly black color adds a hint of sleekness to its robust design. Specifications: Material: steel Color: black mainly Size: Top support plate: about 0.16 x 3.23 x 3.23 inches/ 4 x 82 x 82 mm Bottom support plate: about 0.16 x 4.92 x 4.92 inches/ 4 x 125 x 125 mm Tubes: one is about 17.72 x 0.59 inches/ 45 x 1.5 cm and another one is about 19.69 x 0.79 inches/ 50 x 2 cm Adjustable height range: about 23.23-43.31 inches/ 59-110 cm Weight: one is about 3.5 kg Package includes: 4 x Adjustable jack post Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.