FA20 Window Channel Balance Replacement 1/2" (Resistance 20)

FA20 Window Channel Balance Replacement 1/2" (Resistance 20) Window Channel Balance Replacement Details: 1/2" Channel Balance Actually 5/8" but considered 1/2" in the trade. Channel Depth (Inches): 5/8 Channel Width (Inches): 9/16 Guides Attached: Yes  Channel Sash Balance Winged Guides Pre-Installed  FA Series Sash Balance with Guides pre-attached to the channel. This balance is in stock with guides factory installed.  Number Stamped on Channel 1620 or 16-2 = 17" Long  Vent Weight Range 8 to 12 lbs. 2220 or 22-2 = 23" Long  Vent Weight Range 8 to 12 lbs. 2420 or 24-2 = 25" Long  Vent Weight Range 9 to 15 lbs. 2620 or 26-2 = 27" Long  Vent Weight Range 9 to 13 lbs. 2720 or 27-2 = 28" Long Vent Weight Range 9- to 13 lbs. 2820 or 28-2 = 29" Long  Vent Weight Range 12 to 16 lbs. 3020 or 30-2 = 31" Long  Vent Weight Range 12 to 16 lbs. 3220 or 32-2 = 33" Long  Vent Weight Range 13 to 18 lbs. 3420 or 34-2 = 35" Long  Vent Weight Range 13 to 18 lbs. 3820 or 38-2 = 39" Long  Vent Wei