The McElroy 28 fusion machines will butt fuse pipe sizes from 2-in. IPS to 8-in. DIPS (63 mm to 225 mm). They come in multiple model configurations to assure that your pipe fusion needs are covered. Rolling, TracStar and Pit Bull machines incorporate the interchangeable 28 four-jaw carriage, which can be easily removed for in-ditch fusion. For tight installations, the outer fixed jaw and skid can be removed from the carriage, converting it to a three-jaw carriage for an even more compact fusion unit. Several of these units offer saddle fusion capability in the form of a combination unit that allows fusion of branch saddle with a maximum base diameter of 9.63 in. onto any size main.