hand pump with barometer material:PP,Al tube Volume:2* ... when you push and pull high quality and durable hand pump with barometerItem:BPK-114Material:PP,Al tubestandard parts:noumenon, ... length;50inches Functions: inflate the large inflatable products,namely ,rubber boats,drifting boats,air bed,tent etc.Not only Inflate ... the boats.Pictures of products and using method samples: hand pump with barometer