Proflow's carburettor inlet Hose Ends are made from aluminium with an anodised finish. They're available in a variety of sizes and attachment styles. This particular fitting has male AN6 flare which will allow the use of corresponding hose end depending on you wanting to use 5/16"or 3/8"hose Example: PFE401-05 suits 5/16" hose PFE401-06 suits 3/8" hose