EK-Quantum Surface X280M - Black 3831109838853 For those who demand the most cooling power out of an EK-Quantum Surface radiator, the 58mm-thick X Series is the right choice. These thick radiators will benefit the most from medium and high-speed fans or even a Push/Pull setup. Equipped with a total of four G1/4“ threaded connection ports, the X Series provides additional versatility during the loop planning process. The fifth G1/4“ port located on the end-tank is an irreplaceable feature when it comes to draining the loop and air bleeding. A total of eighteen 2mm wide copper tubes across the entire radiator ensure optimal coolant flow, putting no stress on your cooling loop. High-grade non-louvered copper fins with 18 FPI density provide the best balance between thermal transfer and air resistance. EK doesn't recommend using slow-running fans on X Series EK-Quantum Surface radiators as they require adequate airflow to remove more heat than they absorb in their thick core. EK-Quantum Surface premium radiators are built upon years of development and market research to deliver the best product that the market demands in every possible way. The finish of the materials, mechanical rigidity, and performance have all been brought to another level. Like all other Quantum Line products, EK’s brand new Surface radiators bring numerous performance improvements, including thermal performance, coolant flow restriction, and airflow restriction. With the supplied screws, this radiator is compatible with 140mm fans that have a standard 25mm thickness. EK recommends using EK fans or similar ones with sealed-edge frames. This classic yet effective square shape of the fan casing provides optimal performance in either the pull (suction) or push (pressure) regime without any hydraulic losses, thus ensuring the optimal cooling capacity of your liquid cooling radiators. Thick, extruded aluminum end caps with a contrasting silver finish give the radiator a premium look and feel. They cover the internals and join the stamp-pressed side plates, creating a rigid structure that is pleasant to handle. The stainless-steel side plates are coated with durable semi-gloss black paint, while the fins themselves have a special black matte coating with a high thermal conductivity coefficient. Specifications: Technical and Material: High-grade 99.9% copper fins Copper H90 tubing Brass H62 end tank chambers Stainless Steel side plates Extruded Aluminum Silver anodized end piece covers Brass nickel-plated adapters and plugs Dimensions: 325 x 145 x 58mm (L x W x H) Weight: 1.93kg FPI: 18 Port threads: 5x G1/4" Fan compatibility: 140x140x25mm fan Pressure tested: 1bar Enclosed: EK-Quantum Surface X series radiator 8x Phillips Slotted M4x30mm for 25mm thick fans 8x Phillips Slotted M4x5mm for mounting the radiator directly to the case 6mm steel Allen (Hex) key 9mm steel Allen (Hex) key