Material: stainless steel (SUS301, SUS304, SUS316L), steel, brass, and aluminum Color: galvanized, black, and plain Diameter: 1/8 to 2-1/2 inches (2 - 64mm) Standard: DIN, ANSI/ASME, ISO9001, JIS, and GB Length: 1/4 to 7 inches (4 - 200mm) Grade: 4. 8, 6. 8, 8. 8, and 10. 9 grade Thread: full thread and non-full thread Any specific screws can be provided according to customers' requirements (DIY)