William’s Source-Line hoses features:

A very durable untreated single jacket forestry hose, rated with a service test pressure of 300 PSI (20.7 bars), and constructed of 100% spun polyester lined with TPU elastomer. Supplied with NST aluminum couplings.  The 1½” (38 mm) size SOURCE-LINE* meets or exceeds USDA FSS 5100-187 TYPE 1.