PrimoChill 240mm CTR Phase II D5 Enabled - Clear NEWCompression Ring End Caps, NEW D5 Compatible Pump Head, Easy end cap removal for cleaning, Multi-Port End Cap: 3 ports (1 top inlet and 2 side inlets for return) Delrin compression end caps (optional Acrylic), Stand Off screws for varied height mounting, Rigid Mount Hardware and template Included Includes Vortex Killer for vortex free operation, Optional Colored Aluminum Compression Rings Pre-Installed Ready To Use, Made in the USA. Laser Cut Acrylic Tubes, D5 Compatible Pump Head (Pump not included), Inner Diameter: 2.25 in (57mm), Outer Diameter: 2.50 in (63mm), Overall Length: 11.25 in (285.75mm) (without pump installed)