4Divers is a Dutch dive shop and PADI/NAUI TEC dive school based in Veenendaal, the Netherlands, run by a team called Duikschool. Alongside a large technical and recreational diving equipment webshop (regulators, backplates and wings, drysuits, computers, scooters, rebreather gear), it runs PADI courses from Open Water Diver through Advanced, Nitrox, Rescue, Master Scuba Diver and Divemaster, plus NAUI TEC technical diving courses and DAN first-aid training (BLS, AED, oxygen provider, neurological assessment).