SND International was established in 2005,specialized in designing ,developing and manufacturing door closers. The quality of our products is guaranteed by the well-organized production processed from die casting to machining and assembling. The warranty period for the quality is over 3 years or 500,000 operation cycles as the relevant parts are independently tested to the EN1154 Standard and where required are UL certified. The finished products are also passed the opening cycle,temperature, life time ,overloading test and now proved to  meet the standard requirements.