https://www.acxesspring.com/pc040-390-18800-mw-2000-cg-n-in.html
PC040-390-18800-MW-2000-CG-N-IN | Compression Spring Music W - Acxess Spring Store
High-quality compression spring with 0.04" wire diameter, 5.1 lb/in spring rate, and 6.37 lb max load. Durable Music Wire for reliable performance.