... ,1m,2m,3m or accordind to your requirement 3.Material:ST 52 4.Color:Red,Bule,Yellow or yours DIN 125 ... ST 52 straight pipe for concrete pumpMaterial: 20#steel , St52, or ... or accordind to your requirementCapacity: 20000~30000 m3. DN 125 ST 52 straight pipe for concrete pump