This question should be from these several aspects:
① you find the silicone products factory is not a professional custom silicone key manufacturers, mainly to see the same type of silicone products;
② whether this factory has engineering and technical support;
③ Silicone product factory size is not big enough, not to say that big is good, but at least the quality delivery is better than the workshop type factory;
④ Finally look at this silicone factory is complete technology, so to ensure that process planning is not affected.