SI TECH AB in Sweden is a development and manufacturing company supplying the diving industry with drysuit components, filling hardware and special equipment for military use. The company has a genuine history in the pioneering of equipment for cold water diving. SI TECH AB is located in the vicinity of Lysekil, which is considered by many as the diving metropolitan of Sweden. SI TECH headquarters in Brastad is housing a staff of approximately 20 co-workers with various competencies.

The SI TECH range of core products include: Inflation and Exhaust Valves, Dump Valves, Pee Valve, Seals, Dry Glove Solutions, Modular Quick Change Solutions, Filling Hardware and Gas Inflation Systems.