M4 nuts bolts and washers are made of high-quality stainless steel, which is corrosion-resistant, rust-resistant, not easy to break or deform, and durable. Superb Carbon Steel Material: M4 screws bolts and nuts and washers set are made of high-quality stainless steel, which is corrosion-resistant, rust-proof, not easy to break, and has excellent stability.
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