The door closer is made of environmentally friendly aluminum alloy material. Suitable for doors from 25-110kg. From die-casting to finishing, all are produced by ourselves, and the quality can be strictly controlled in every step. Each product will go through 6 times of QC, and the service life will reach 300,000-500,000 times. We can also configure different hydraulic oils according to the minimum temperature and maximum temperature of the customer's country to ensure that each product can be used normally under low or high temperature conditions.We can provide material testing reports and factory ISO9001 certificates, so that customers can use our products with peace of mind