SC Protium 2.0 Reservoir 200mm Acrylic Black SC-P2-200R-ACBK The SC Protium Reservoir 200mm comes in three different colors/materials, Clear Acrylic with Black or Silver metal and Black Acetal with Black Metal. It uses a retention ring design instead of threaded caps. This allows for 360-degree rotation of the reservoir caps, and it is far more durable than caps which thread onto the inside of the reservoir tube. The retention rings are built from CNC machined anodized aluminum and do not contact the fluid. Specifications: SC Protium 2.0 Reservoir Retention Rings x2: Aluminum. Black or Silver Anodized. CNC Machined. SC Protium 2.0 Reservoir Caps x2: Clear Cast Acrylic or Black Acetal. CNC Machined. SC Protium 2.0 Reservoir Tube: Clear Cast Acrylic: Length: 200mm. Diameter: 60mm. CNC Machined. Protium 2.0 Inlet Tube: Clear Cast Acrylic. SC Protium 2.0 ARGB Cover: 1.6mm PCB Black: Addressable ARGB/DRGB 5V: 6 LEDs. Black 500mm Cable. M4 x 6mm Stainless Steel Fasteners. O-Rings: Silicone 70 Durometer White x2. Buna 50 Durometer Black G1/4” x2. Stop Fittings x2: Brass. CNC Machined. Powder coated Black. Laser Etched. Weight: 0.4kg. Dimensions: H: 273mm (Not including stop fittings). Diameter: 64mm (Retention Rings). Packaged Weight: 0.45kg. Packaged Dimensions: H: 270mm x W: 85mm x D: 85mm.