... ,price first .and customer foremost! Feature:Solar Keymark Solar Project Collector---Solar Keymark,SRCC,CE CCC Solar collector,solar energy collector,solar power collector,solar thermal collector.1. Manifold (interior)material: red ... tube)5. Insulation layer: rock wool6.Test pressure: 6 bar7.Heat preservation: 72 hrs 8.Hail resistance: 25mm Solar Keymark SRCC--Solar Heat Pipe Collector