Replacement Brake Knob for Exercise Bike Resistance Adjustment Knob Assembly for Indoor Cycling and Stationary Bikes Durable Construction Made from high-quality steel and ABS material for enhanced strength and longevity Easy Installation Simple to install and use; features a built-in spring handle design that is comfortable and safe on the hands Dimensions Total length: 24 cm (9.45 inches); resistance bar length: 21 cm (8.27 inches); knob length: 4 cm (1.57 inches). Thread diameter: 8 mm (upper), 6 mm (lower). Thread length: 4.5 cm (1.77 inches, upper), 2 cm (0.79 inches, lower) Package Includes 1 x Exercise Bike Resistance Bar with Adjustment Knob Specifications: Material: Metal, ABS Size Details: - Total Length: 24 cm (9.45 inches) - Resistance Bar: 21 cm (8.27 inches) - Resistance Knob: 4 cm (1.57 inches) Package Includes: 1 x Resistance Bar with Adjustment Knob Note: Slight measurement variations may occur due to manual measurement and display differences