The DS1402D-41 is the subassembly for the spring-mounted Blue Dot™ iButton® reader found in the DS1402D-DR8 and DS1402D-DB8. It is constructed of four component parts that are also available for order separately: * DS1402D-11 Small Blue Insert * DS1402D-10 Small Data Contact Spring * DS1402D-3 Large Blue Support * DS1402D-17 Large Ground Contact Assembly instructions are provided showing how to assemble the Blue Dot from the component parts in three easy steps. https://elecena.pl/product/22301240/button-probe-blue-dot-subassembly 2022-12-25 https://elecena.pl/product/22301240/button-probe-blue-dot-subassembly 2025-01-17