EKWB (Edvard König Water Blocks) is a Slovenian company founded in 2003, widely considered the premier brand for custom liquid cooling components. EKWB designs and manufactures high‑quality water blocks, radiators, reservoirs, pumps, and fittings for PC enthusiasts who demand the best thermal performance and aesthetics.

EK products are known for their precision engineering and sleek designs. They collaborate with major hardware brands (ASUS, MSI, etc.) to create motherboard monoblocks and pre‑installed GPU water blocks. They have also expanded into AIO coolers (EK‑Nucleus) and gaming PCs (EK Fluid Gaming).