Features: brand new and high quality Package includes a total of 4 sets 20 piecs screws . Usually used for laptop computer for case water cooling fan screws Laptop screws for hard disk, keyboard, memory, motherboard, for case etc. 6#-32 screws M3.5 thread fit for computer water cooling system and fans and more Made of high quality material, durable and practical. Specifications: Material: Carbon steel Size: 6#-32x30mm/1.26x1.18in Thread Diameter: 6#-32 (3.4mm) Length(except for head): approx 30mm/1.18in Thread Length: approx 8mm Quantity: 20PCS Note: Transition: 1cm=10mm=0.39inch Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. for Wish you a pleasant shopping experience! Package includes: 20 PCS x Screws