Spiral balance for 2002 DANVID window

I searched and found your S900-30 part which closely matches the 3/8 inch tubular balances I have in Savannah GA. My balances are inside a white plastic sheath, but I don't see the availability of ones with a sheath.

I have no idea as to the weight of the tilting lower sash of these single hung windows. They are 26w x 27h overall dimension with a double glass design. The windows are currently 800 miles from me so please make me an educated guess on the weight.

The pawl color is white but I don't see that as an available option. I would guess your red or green is my best choice?

My balances have only one pin on the tip to connect to the shoe. Would it be advisable to grind off the upper or lower pin if I discover physical interference?

Would my purchase of six balances be exchangeable if I guessed wrong on this match?

Could you give me a price on the six S900-30, plus a 75-006 charging tool, shipped to Macungie PA 18062

Thanks for the feedback, Paul.
I still have the question about (1)your return/exchange policy if I've totally chosen the wrong item and (2)whether you believe I could grind off the extra pin if I have a physical interference. I have one round pin and definitely tilt sashes and I don't have much confidence that the flat pin shown on the 600 series will enter my shoes. You are correct about the vinyl sheath disintegrating with UV damage. That was the cause of my current spring re-coiling since the sheath was the only constraint for the coil spring.