I will need 20 in all for 10 windows. The original hardware was stamped with UB28B , UB28C and 28D. I have measured and weighed all the windows which you will find below:
1. Qty 3 sets - 28D - measured 51x32 at 28.5 lbs
2. Qty 6 sets - UB28C - measured 35x31 at 19 lbs
3. Qty 1 set - UB28B - measured 32x35 at 15 lbs
All of the metal portions of the channel balances measured 29 inches.
