PCIE X4 TO PCIE X1 EXTENDER R21SF, R21SL, R21SR Description Product ID: R21SF, R21SL, R21SR Interface: PCIe x4 / PCIe x1 Application: Extension Shelf time:2020-01-10 11:07:19 Product description: PCIe x4 extender adapter jumper for PCIe x1 Cards, Capture Card, gigabit wireless LAN, USB, Audio cards. Inquire Now View More Details File Download 1 (405 KB)