PrimoChill CTR (Compression Tube Reservoir) System Phase II is the latest in a slew of new products that PrimoChill is catering towards the modders and their need for color!!! What makes the NEW CTRs so unique and not like anything on the market today is the ingenious compression ring end caps that make a water tight seal without the need to cut or tap the end of the reservoir. Similar to the PrimoChill Rigid fittings, the CTR Phase II uses the same principal for securing and sealing off the acrylic tube with little to no force on the tube which prevents cracking. CTRs are the next best thing in the water cooling industry giving the user the flexibility of color as well as sizes to fit their build perfectly. CTRs are certain to be copied, but remember that PrimoChill’s are Made in the USA, by Americans.. Specifications Inner Diameter (ID): 2.25 inches / (57mm) Outer Diameter (OD): 2.5 inches / (63mm) Overall Length: 325mm (with pump installed) Fitting Thread:G 1/4 Warranty: 1 year Material:Laser Cut Acrylic Tubes Compatibility Fittings: G1/4 thread Pump (NOT INCLUDED): Laing D5 variants / PrimoChill PWM D5 Parts Included 2x Low Profile Port Caps w/ O-ring 1x LED Port Cap w/ O-ring 1x 3 Port Mountable End Cap - Black POM (Installed) 1x D5 Pump Head - Black POM (Installed) 3x Knurled Mount Ring - Color Based on Option (2x Installed) Mounting Hardware 2x Rubber Anti-Vibration Pad 4x CTR O-rings (Installed) 1x Pump O-ring (Installed) 1x 240mm CTR Tube - Clear (Installed) 1x Acrylic Shim 1x Rubber Shim 1x Internal Vortex Break (Installed) Warnings Use of caustic coolant will void your warranty and cause your reservoir to crack. Not responsible for any hardware damage. Use at your own risk.