New! Delta Selective Solder Solid Core Wire. A newly designed Selective Solder Solid Wire spool has been specifically designed for Selective Soldering equipment where it can distinguish between leaded and lead-free alloys based on the color of the spool. Selective Soldering is designed to selectively solder components to specific areas of printed circuit boards and molded modules when traditional wave soldering is not possible. Selective Solder Solid Wire is compatible with most selective solder equipment machines that have the vision recognition feature built in. Qualitek offers white spools for leaded alloys and green spools for lead-free alloys. Available in 8lb. spool. Qualitek solid wire solders meet or exceed J-STD-006C. | View Product TDS & SDS | Product Info. Sheet | Price varies by quantity. Products must be added to cart to see discount.