Hi Sandy, I'm glad to assist you. As for our supplier, Standard Motor Products, the part specifications are as follows: 1. Filter Element Included: Yes 2. Hose Connector Quantity: 3 3. Hose Size - Inches: 5/16, 3/8, 7/16 " Hose Size - mm:8 mm, 10 mm, 12 mm 4. Length - Inches: 7.4" 5. Port Quantity:3 Warranty: 3 years/36,000 mile The diameter is not noted, however. This fits a specific vehicle application. Please provide the complete information of your vehicle for us to check fitment (year, make, model, submodel, and engine size). But, tell us if you will be using this part on a custom-built vehicle application. Click the link below to order this if you decide to buy this. I hope this helps. Happy shopping. https://www.carparts.com/vapor-canister/standard/sicp1022?can=CPJE1043_20220606