Bob from SWISCO responded:
January 25, 2019
Hi Henry, thanks for posting. Can you confirm that the length of the metal channel (but not including the nylon attachments) is 25"? If so, this looks like either are S380-25 or S385-25 Channel Balance. The only difference between these two Series is the 'depth' of the bottom nylon shoe. With the Series 380 the depth of this nylon shoe is 1", whereas with the Series 385 it is 1-3/32". Compare with your own and see what is best. You will need to select a stamp option. Your stamped number 24 4 confirms to our stamp option 2440, for a window sash weight range of 19 through 24 lbs. Let us know if you have any questions. |