DH elevator links are important tools to control the descending and ascending of the elevators in the operation of well-drill or gas-drill or gas-drill or geological prospecting. DH single arm elevator links series are forged from a single billet of high quality materials and carefully surface-harden-treated to withstand the stresses and shocks of heavy service with strict intense test and NDE. The rating loads of elevator links series are 150t (1350kN), 200t (1780kN), 250t (2250kN), 350t (3150kN), 500t (4450kN). All the technical parameter and property of the elevator links completely conform to the requirements of GB/T 19190 and API Spec 8C.