Light Duty LF Series Ball Transfer Units - Flange Mounted 2 & 4 Hole High profile, surface mounted units with fixing flange. Pressed steel construction with either 2 or 4 fixing points. LF26 units incorporate 2 slots rather than holes to accommodate varying fixing centers. (2.203" - 2.375")(55.9mm - 60.3mm). LF units feature debris drain hole. Models LF25 & LF38 omit felt seal.