Tubes, tube fittings,metal tubes,tube fitting,sucker rod coupling,sucker rod,coupling
Yantai yunsheng petroleum machine accessories co., ltd, founded in 1997, is a professional manufacturer producing api approved sucker rod couplings, includin spray metal sucker rod coupling, calss t sucker rod coupling, sub od sucker rod coupling, full size sucker rod coupling and slim hole sucker rod coupling,with the size range of 5/8", 3/4", 7/8", 1" 1-1/8". materials is aisi 5140¿monthly production capacity reach to 20,000pcs.all of our products are excellent in quality and low in price.