20-Pack KEDSUM UL Listed Non-shunted Turn-type T8 Lamp Holder Tombstone Medium Bi-Pin Sockets for LED/Fluorescent Tube Light Replacements- Standard Profile UL certified product, reliable quality Non-Shunted T8 Lamp holder tombstone for LED fluorescent tube Easy to use, hassle-free installation and standby application Ideal to replace the old or damaged socket for your T8 light [Maximum wiring size is #14 wire] Multiple uses: design for use with single end powered and dual end powered tube lights