The Per-Fit flush joint pipe by L.B. Foster features a thread design to assure the connection integrity in pipe sizes 31⁄2 inches OD to 123⁄4 inches OD. It offers a low-profile thread design with an internal thread on one end and an external thread on the other end, eliminating the need for coupling. It is designed for casing, liner pipe and many other environmental applications, and the Per-Fit is manufactured to your customized length requirements. L.B. Foster, Card No. 179