"Weight Code - The second two numbers or letter refers to the weight code.Your balance may be marked with two numbers, such as 2420, or it may also be marked with just one number or letter, such as a, b, c, d, e, or 1, 2, 3, 4, 5. see examplePlease include, any number or letters on Channel Balance.How to Replace a Channel Balance in a Non-Tilt WindowPriced and sold each." . . . . .