Iron material ,casting handle OEM service offered Durable in use Buyer label offered Strict inspection before shipment door spring box,volume gate accessories,rollling door accessories1.Size:XF-S0012.Material: iron3.Diameter: 38mm, 50mm,60mm4.OEM service offered5.Exterior Diameter:200mm,205mm,220mm,240mm 6.Springwidth:38mm,50mm,60mm,75mm,7.Sssort Pipeline Diameter: 30mm,42mm,50mm,6omm,75mm,8. ...