PSI offers the non-metallic PE casing spacer and the all non-metallic Ranger II® casing spacer. The Ranger II casing spacer requires no bolts and nuts, can center or restrain pipe, and can compensate for grade adjustments with a variety of different runner heights. Ranger II casing spacers are designed for carrier pipe diameters from 0.83" (21 mm) to 37.60" (955 mm) in diameter