Hi..Have a part very similar to your Kenna
23-048 roller assembly. Mine has a W on it with a crown over the W and then it says 3/4 Front and 1 3/8 Rear...It is 3 1/2 in high and 1 1/2 wide. It is 3/8 from the back of the frame to the offset frame and 3/4 from the back of the frame to the middle of the nylon wheel. Would that be the same as your
23-048? also this is on the front sliding door. Thanks