hand double action hand pump valume is 5000cc high quality plastic material SpecificationsDouble Action Hand Pump 1.Easy and convenient use 2.High Quality and Durable 3.Competitive price and fast deliveryDouble Action Hand Pump4.5" , 5" , 8" , 11" , 14" , 16" ,19" , 20" for chooseSpecial interlock system to prevent pop out while pumpingFoot Rest plate 20inch 5000cc double action hand pump