Discover the perfect replacement with our high-quality chainsaw part, tailored for models 350, 351, 370, 371, 390, and 420. Crafted with superior materials, it ensures durability with high hardness and excellent strength. Enjoy a experience with easy installation, saving you valuable time. Prioritize compatibility by comparing it with your original parts before ordering. Elevate your chainsaw performance with this premium replacement, designed for seamless integration with your equipment, offering versatility and peace of mind for your purchase. Features: 1. Ideal replacement for the original one. 2. Easy to use and install. 3. Suitable for Partner 350 351 370 371 390 420 replacement. 4. Widely used in agriculture, fishery, animal husbandry, aquaculture, forestry. Specification: Material: Metal Color: As Pictures Shown Size: Approx.40mm / 1.6 inch, 63mm / 2.5 inch, 73mm / 2.9 inch Package list: 3 * Spring (In different size)