Installs: 22X37 (GXP) bearing | Inner Step Outer Diameter: 21.9mm | Outer Diameter: 36.8mm | Thickness: 7mm | Thru Hole Diameter: 0.387" (9.8mm) | Inner hole sized to fit 1/2" ACME threaded rod | Compatible with BP0006, BP0007 | Machined, red anodized aluminum | Sold individually