This Parallel cum Bellmouth type of expander. Self-retaining rolls in cage, help in holding the rolls inside the cage even after the mandrel is fully pulled out of the cage. This helps in placing the cage in the tubes and then insert mandrel later for expansion where it is difficult to place the full expander with mandrel inserted. Also, the body Dia of the tool is less compared to other series of expanders, hence these 114 series Tools are preferably use for expansion of tube thru holes or headers in Boilers. It is most economical and rugged hence know as a workhorse in its category. Due to its superior performance, long life and easy availability, it is used throughout world. Covers all the major tube sizes for Boiler. Available in 5 different sizes of roller length, one can select the model as per the drum thickness or required length of expansion. Expansion length range from 12 mm to 66.60 mm. It has 2 plain roll and 2 short plain and 2 flair rolls. Rolls are overlapping, which prevents the ridging of tubes during flaring of tube ends. Also, can be converted and used as parallel Expander with few modifications.