Features: 1) With pins 2) Hollow inside 3) Water impervious 4) Float on water, loating capacity 30kg, and Fix the gasbag 5) will add the loating capacity 6) 159kg capacity, and Load 400kg don't ruptured 7) L1830 x W440 x H50mm, N.W: 7.5kg 8)L1870 x W460 x H60mm (packing size), G.W: 9.0kg N.W. 7.5kgs 9) X-ray translucent 10) Material: HDPE 11) Packed 1 board each Case.