... or as your requirement The detail information for the Piston Type hydraulic cylinder for excavatoer as below:Application: Loader,Steer ... Double ActingSeal Type: NOK, PARKER or as customer's requirementPiston Rod: Chrome or nickel plated,ground & polished piston rodTube: High ... loader,excavator,etc.):b.Type of function(hoist,swing,steering,etc.):c.Type of structure(piston,telescopic):d.Single acting ...