... 9mm, with CE/UL 3.warranty:3 years... Type: Pool inflatable pool 1.size,shape, color can be customized. 2.material ... : Qucikly and convenient to be operated and taken away. Suitable for playing water ball, water roller, paddler boat, electrical bumper boat, ... : There will be discount for ordering 2 pcs or more!There will be discount for second order or more!! 2012 best quality inflatable pool for kids