Features: * Made of plastic material, long service life and practical * Easy to install, just screw it in the required position * The knob is anti-slip and can be turned by hand * Suitable for most steppers * Screw diameter is about 14mm (0.55inch) Specifications: *Product Name: Steppers Machine Knob Pin *Material: plastic+metal *Size: approx. Screw diameter: 14mm (0.55inch) Length: 3cm(1.2inch) *Color: black, red, gray *Weight: about 50g Package Content: 1 x Steppers Machine Knob Pin Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data(1cm=0.39inch) Features: Aceovo 14mm Steppers Machine Knob Pin Replacement Hand Tighten Bolts Gym Accessories gray Material: light weight, good strength and well temperature resistance, good impact resistance Appearance and performance: automatic cutting, smooth edge, fit most of the road bicycles, delicate texture. Compatibility: smooth surface and exquisite workmanship, fit most of the bicycles. Easy Installation: Brand new and high quality, easy to install.