Vee Packing Set, 4.50 Inch OD, 3.75 Inch ID, 0.19 Inch Height

The quantity of urethane and fabric vee rings varies depending on the pressure range you need. The "How To Order" section explains the code; the 2nd number is the quantity of Urethane vee rings, and the 3rd is the quantity of Fabric vee rings.

For that pressure range, you'd want to go with the 5-vee configuration, which covers up to 5,000 PSI. The set is built so you can run 4 vees for up to 3,000 PSI, 5 vees for up to 5,000 PSI, or 6 vees when you're pushing all the way to 10,000 PSI. The rings themselves are a mix of urethane and fabric-reinforced rubber, with nylon adaptors on the top and bottom. So the stack height will vary depending on how many vee rings you run, but the adaptors stay the same.

For sizing, match the set’s ID and OD to your hardware. This one is 3.75 inch ID and 4.50 inch OD, with an overall height right around 0.188 inch (often shown as 0.19).