McElroy 500 Machines will butt fuse pipe sizes from 6" IPS - 20" OD (180mm - 500mm). All models incorporate the interchangeable 500 carriage with McElroy's patented Centerline Guidance System. Two fixed and movable clamping jaws result in precision pipe alignment for higher quality fusion joints. The standard manifold machines are DataLogger® compatible and can fabricate segmented ells with optional mitered inserts.