$19.80Metric Steel Belleville Spring Washer.906"(23.0mm) Outer Diameter, 0.480"(12.2mm) Inner Diameter.059"(1.5mm) Thickness, 3,338 Newtons Max. Load (Pack of 10)Amazon- $21.11CREAP Bearing Steel Balls Diameter 10/10.319/10.5/11/11.113/11.5/11.906/12/12.3/12.5/12.7mm Bearing Roller Solid Beads (Size : 50Pcs, Color : 12.5mm)Amazon