MOTM

The current, lead solder (63% lead, 37% tin) has the following Kester part
numbers:

Kester 331 Organic is part number 24-6337-6401 (0.020 dia)

Kester 245 no-clean is part number 24-6337-8800 (0.031 dia)

There *are* lead-free versions (containing Tin/Silver/Copper) that are also
'331' and '245' (these numbers refer to the flux inside the solder).

So, when looking to buy, use these 24-xxx-xxx numbers in *this* email.

Paul S.