This is the black silicone protective sock that is stretched over the RTK Facet or RTK Facet L-Band and is intended for users who need to repair a device. Open Source Hardware has the benefit of allowing a user to understand and repair a broken device themselves! Note: This protective sock is compatible with the both the RTK Facet and the RTK Facet L-Band models. For more information please see the disassembly and repair instructions . Please see the recommended products below for additional RTK parts that may be needed for a repair. https://elecena.pl/product/24770069/sparkfun-rtk-replacement-parts-facet-rubber-sock 2024-01-05 https://elecena.pl/product/24770069/sparkfun-rtk-replacement-parts-facet-rubber-sock 2025-04-13