Spiral Window Balance Replacement FL18 Color:Red Bearing Features include a vacuum cup

Features include a vacuum cup for a positive grip on the glass with a radius bar which is ruled for precise adjustment

Using three hinges with 5/16" to 1/2" glass (8 to 12 mm) the hinge will hold up to 120 lbs

Both formats (18-40 and 18-4) represent the same balance

2-3/16 Tall

1/8" + glass + 1/2" aluminum spacer + 1/8" glass = to 3/4" Overall unit

Spiral Window Balance Replacement FL18 Color:Red Bearing Features include a vacuum cupFL18 Spiral Window Balance Replacement Tilt Window, 18 inch long, Only available in Red Bearing 3 8 inch Diameter, 1 per pkg. DESCRIPTION The FL18 is a Tilt style Spiral Balance with a red bearing at its tip. balance is constructed of a mill finished metal tube measuring 3 8 in. in diameter. The FL series spiral balance features rod extension; measures 3 4 in. The colored nylon bushings of these spiral tilt balances indicate their spring and sash