The Welger 0920301800 Shear Pin Bushing is a genuine OEM replacement part specifically designed for Welger AP and RP series round and square balers. This critical component serves to protect the baler's driveline from potential damage by allowing a shear pin to break under excessive stress, thereby safeguarding more expensive components. Engineered for a precise fit and reliable performance in demanding agricultural environments, it features an outer diameter of 22 mm, an inner diameter of 16 mm, and an overall length of 25 mm.