DISCONTINUED ITEM - REPLACEMENT AVAILABLE
777 Series tilt In window channel balance with attached metal clip # 23 
Metal clip from channel balance locks into top of balance shoe # 640065 (old or new style) 
This balance is typically used in vinyl windows.
Used by Thermal Industries, Jordan, Owens Corning and other vinyl window companies.

Channel Width: 9/16 inch (referred to as 1/2 in the trades)
Channel Depth: 17/32 inch 
Length of Metal Channel Balance: 10-44 inches
Number stamped on Balance: Number 12-44  and Letter A-i
Sash Weight: 2-45 pounds
Bottom Metal Clip: # 23

NOTE:
This Channel Balance is replaced with 62736 with new brake shoe 6250014