Universal Replacement wet end.
These wet ends have two sets of brass inserts.
This allows them to be used on either a 48Y frame or a 56Y frame thru bolt motor.
INSIDE INSERTS ARE 3 11/16" APART FOR 48Y
(CENTERLINE MEASUREMENT)
OUTSIDE INSERTS ARE 4 1/8" APART FOR 56Y
(CENTERLINE MEASUREMENT)