Features: 1) With pins 2) Hollow inside 3) X-ray translucent 4) Float on water, loating capacity 30kg, and Fix the gasbag will add the loating capacity 5) Compatible with most head immobilizers 6) 159KG capacity 7) L1830 x W450 x H60, N.W: 7.5kg 8) L1870 x W470 x H70 (packing size), G.W: 9.0kg 9) Material: HDPE, Packed 1 board each Case.