... .International Q235 bridge steel ,white PVC manger, ball valve type automatic water equipment, white PVC water pipe, 3MM U type ... , damage rate of eggs is zero.3.White PVC trough, full new PVC material, resists compression, heat-resistant, not deformation, ... the water arbitrary length pressure of chicken coop4. the white PVC pipes: new PVC material, not deformation, heat resistance, difficult to damage. ...