... Material: 304 stainless steel ;1. 2-12 loops optional, 1'' main bars and 3/4"outlets;2. Equipped with viewable and ... 6. straight valves(233,234) with thermometer, angle valves(235,236) with thermometer, strainer valves(237,238) with thermometer optional , strainer7. Test ... one carton for one set(but a little expensive) 304 Stainless Steel manifold(water separate) for underfloor heating system