The successor to the WH16NS40, and the last internal 5.25" LG drive made. Out of production. Flash to 1.02 firmware for UHD. Stock 1.02 units work without any extra steps once you've enabled LibreDrive in MakeMKV. Same enclosure requirements as the NS40. Harder to find than it was, but new old stock still turns up on eBay.
Specs
Connection
SATA (needs enclosure)
UHD Capable
Yes
Needs Enclosure
Yes