CM M2 M2.5 M3 M4 Black Carbon Steel Cross Phillips Ultra Thin Flat Wafer Head Bolt Laptop Screws Material: Carbon Steel Size: M2 / M2.5 / M3 / M4 Metric thread diameter:M2(2mm) / M2.5(2.5mm) / M3(3mm) / M4(4mm) Metric thread pitch:0.4mm(M2) /0.45mm(M2.5) / 0.5mm(M3) / 0.7mm(M4) Thread length: 3mm-16mm FAQ Q: If i fail to receive the item in estimated time ? A: Don't worry ,because sometimes there will be some shipping delay because of holiday or wrong address, pls contact the seller by e-mail, we will help you contact the shipping company to solve it successfully and finally get it . If you can't receive it, we will full refund or resend it for you. We are honest seller, so don't worry. Q: What could i do if i receive the broken item? A: Don't worry , will issue you the refund or send a new one if we get the broken picture of the item from you . Q: I am not satisfied with the product,what should i do? A:Please contact with us in time, we will help you solve it. Feedback 1. We maintain high standards of excellence and strive for 100% customer satisfaction! 2. Your feedback is very important for us, before giving us neutral or negative feedback, we hope you to contact us,so that we can satisfactorily solve your problem! 3. We will deliver goods on time,but transportation time we can't accurate know after delivery,because it is related to distance, weather, etc. If because of the transportation time affect your mood,Please objective analysis, because it is not my responsibility,but the responsibility of the shipping company.Please don't give me neutral or negative feedback because of the transportation time. _x000D_