why does it say 360mm radiator, but the dimensions say its almost 400 mm long

The 360mm designation refers to the size category of the radiator, which typically accommodates three 120mm fans. The actual dimensions of the radiator are 397mm long, which is common for radiators in this category.

Questions & Answers: SAMA Q70 Black CPU Liquid Cooler, 360MM Liquid Water AIO CPU Cooler with 2.8" LCD Display, Magnetic Detachable, XT120 Modular Fans LCP Blade, Bonus Stands, 115X, 2011, 1200, 1700, AM4, AM5 AIO Cooler

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SAMA Q70 Black CPU Liquid Cooler, 360MM Liquid Water AIO CPU Cooler with 2.8" LCD Display, Magnetic Detachable, XT120 Modular Fans LCP Blade, Bonus Stands, 115X, 2011, 1200, 1700, AM4, AM5 AIO Cooler

2.8" LCD display screen needs software. Available for download on the SAMA official website (https://www.samagears.com/q70/).
Innovative Modular Function: The SAMA Q70 features a magnetic attachment system, allowing easy detachment and repositioning within your setup.
Intelligent control: Equipped with a programmable intelligent control module, it supports PWM control, and can realize real-time control of CPU temperature, fan speed and RGB lighting effect through the built-in LCD screen.
Compatible with Intel sockets: LGA 115X/1200/1700/1851/20XX and AMD sockets: AM5/AM4.
3x ARGB PWM Fans with extreme speeds of up to 2600 RPM.
Easy Installation: 360mm radiator (397 x 120 x 27mm).
Thick Copper Base: Enables the cooler to effectively manage high temperatures and maintain optimal performance, even under demanding workloads.
Five-year warranty.

$122^.99 –