AN-4: This size corresponds to a hose with an inner diameter of 4/16" or 1/4". AN-4 hoses are commonly used for low-flow applications such as vacuum lines or small oil lines. AN-6: AN-6 hoses have an inner diameter of 6/16" or 3/8". They are versatile and find applications in fuel systems, oil cooling systems, and hydraulic systems where moderate flow rates are required. AN-8: With an inner diameter of 8/16" or 1/2", AN-8 hoses are suitable for applications requiring higher flow rates such as larger oil and fuel lines in high-performance vehicles or aircraft. AN-10: AN-10 hoses feature an inner diameter of 10/16" or 5/8". These hoses are commonly used in demanding applications like oil coolers, transmission coolers, or power steering systems. AN-12: AN-12 hoses have an inner diameter of 12/16" or 3/4". They are typically employed in heavy-duty applications such as large oil or fuel lines in high-performance engines or industrial machinery. **Price Per Meter**