Lenovo 5H50S28991 is a replacement pair of display hinges for ThinkBook 14 laptops. The set includes the right and left hinges, used to attach and support the laptop display as it opens and closes.
The listing identifies the part for 14-inch laptops and names compatible models including ThinkBook 14 G2 ARE (20VF), ThinkBook 14 G2 ITL (20VD), ThinkBook 14 G3 ITL (21A3), ThinkBook 14 G3 ACL (21A2), ThinkBook 14 G4 ABA (21DK) and ThinkBook 14 G4 IAP (21DH).