... 1. Injection Pvc moulds 2.Seamless titanium tube 3. Compact design 4. R22, R410a,R407c,R134a ... protection.They are suited to the use by swimming pool, seafood markets, and electroplating, chemical and medical industries ... .Outward can be made of 3 kinds of material: PVC-U ,PP-R, stainless ... Stainless steel)Water/sea water/antifreeze 10.5kw Spa pool heat pump heat exchanger