Easyflex Solar Line Systems are made of durable Stainless Steel 304 /316 L which is corrosion resistant. Our high density EPDM insulation provides the maximum performance for all you solar line system. Easyflex fittings are made of Brass UNS C37700 with inner components that consist of silicon sealing ring and Nylon 66/ Fiberglass High Temperature Gasket. Our CSST has a Burst Pressure of 1420 psi and an Operating Pressure of 147 psi. Durability doesn’t stop there, with a working temperature of 300 F with an intermittent High-Temperature Exposure limit of 428 F it will withstand extreme outdoor temperatures and conditions. Unlimited flexibility and one-step push fitting requires no special tools and completes the job in no time.