Timing Belt Pulley, V Belt Pulley, Locking Device manufacturer / supplier in China, offering Factory Direct Sales Three Phase -80kpa 5.5kw 250m3/H Oil-Free Dry Rotary Vane Vacuum Pumps, High Quality Durable Cast Iron HRC Shaft Couplings HRC70 HRC90 HRC110 HRC130 HRC150 HRC180 HRC230 HRC280, Timing Pulley/Aluminum/T2.5 (pitch=2.5mm) for Belt Width 6mm and so on.