Please quote us CIF Hodeida port the following:1. Riser pipe DN 5 1/2 inch , length = 6 m each , wall thickness = 6mm , QTY=900 PCS with joint.2. Riser pipe DN 4 1/2 inch , length = 6 m each , wall thickness = 6mm , QTY=950 PCS with joint.3. Joints for Riser pipe DN 5 1/2 inch add , QTY=900 PCS4. Joints for Riser pipe DN 4 1/2 inch add ,QTY=950 PCSRiser Pipes : the riser pipes shall be in accordance with 15Mo3 DIN 17175 . the pipes shall be seamless steel and shall be thread in both sides according to API-5L, 8 thread per inch, for each side length is not less than 100mm.Joints : manufactured to 15Mo3 according to DIN 17175steel with length of 250mm and to be thread and coupled with coarse 8 thread/ inch API standard thread.We need the above items for submersible pumps up to 500m.