They can be supplied either with flush or socketed type joints and in thread configurations such as BSP, trapezoidal or square type all with varying pitches as required. The casing & screens have a very high tensile strength making them suitable for a wide range of applications and uses including water supply, environmental and land drainage work. In addition to PVC-U material they can also be supplied in HDPE. All the accessories such as lifting heads, end caps, centralizers, casing clamps, sand traps can also be supplied for each size.