1, easy to move&storage after folded 2, easy installation on site 3, loading water for weighting test 4, re-usable The weighting test water bag is made by reinforced fabric with PVC coated and HF welding.The shape is like cylinder.The fittings include:1) 1x5 inch inlet of top port with cap2) 1x2 inch oulet of ball valveThe weighting type:1) 3 ton weighting2) 5 ton weighting water weighting bag