Window Channel Balance stamping

Thanks for posting. Yes, a channel balance stamp number of 29 5 conforms to our stamp option of 2950. I see you were looking at the S380-30. It's stamp option of 2950 is for a window sash in the weight range of 28 through 32 lbs. Remember, if you are ever uncertain which stamp option to select, you can always weigh your window sash and match that precise weight with one of the stamp options listed on the product page.