A Penn 525 Mag (USA) Left Side Plate Speed Bush . It push-fits into a recess in the centre of the left side plate with the end plate bearing fitted at the back.
The standard Penn part is not available as a spare so we have put that situation right. In addition our custom version of this part has a tighter tolerance to ensure better support of the end of the spool spindle.
Please note this WILL NOT fit later Mag2 and Mag3 models.