1. The welding torch is punched out by Standard 59-1 Brass Stick, that prevent appearance of holes and leakages. The aluminium capacity  less than 3, so that the product will not be changed color after long-term usage.
2. All the valve poles are matched themselves tightly for reducing abrasion on valve needles, this can guarantee the longevity of the products, as well as they work smoothly
3. It's difficult for our products to bend during usage for we use enough thick brass tubes.
4. The welding position will not be moved for using high-frequency ultrasonic to weld.
5. The product is packed separately by small colour box, that makes more exquisite and beautiful.