Attractive appearance,strong resistance to environment,integrating the advantages of general cylinder and thin cylinder,various installation forms and wide application,exteral form and installation size conform to ISO/6341 international standard, adjustable buffer fitted at both ends to reduce impact,provided with push-in slot for installation of magnet switch,which can fix the magnet switch at any possition and can also be fixed to enable the cylinder to reverse or stop at any position; the working medium is the filtered and oil-misted compressed air,the air cylinder without the need to add lube.