... operation, AutomaticProtection degree: IP55 MaterialPump head: SUS304, SUS316, 304+PTFE, 316+PTFEDiaphragm: PTFEValve: SUS304, SUS316Valve ball: ZrO2, SUS304, SUS316, CeramicWork ConditionEnvitonment temperature: -30°C--- 90 ... EPDM stretch rubber, the third is 3.00 mm thick SUS304 that supporting the iron corn. The fourth is also the ...