The Ruland 3-15/16″ Bore NOMAR Two Piece Split Shaft Collar SP-63-F is a black oxide 1215 lead-free steel clamping shaft collar made in the United States. With a bore size of 2-3/16 inches, this two-piece split collar is designed to provide a secure and precise fit on a shaft. The product does not come with a bundle description, and its model is SP-35-F. This high-quality and durable shaft collar is ideal for use in mechanical power transmission and industrial automation applications.