Futurekart 200PCS 20 Kinds Size Extension Springs and Compression Spring Kits, Small Springs, 3D Printer Accessories, Suitable for 3D Printers, Machine DIY or Home Maintenance (Silver) Radial Bearings

Material: Spring steel,which has excellent elasticity and fatigue resistance, provide additional durability for appropriate tension. High Quality:Stable and durable,corrosion resistant, zinc Plated surface, smooth and no stab, riveting smooth, high ductility, good fatigue strength,It has good performance and service life. 20 kinds of different specifications and sizes springs, can meet a various of different needs. Easy for store: The springs are neatly packed in a clean, transparent box for easy storage. Come with a durable plastic storage box, with individual slots for separating each product size independently, contrast with size chart on lid, convenient to identify, use and carry.