Material: reinforced PBT Solid base, stainless steel grease nipples. These products have the following features: automatic aligning, repeated lubrication, anticorrosive, dust proof and convenience for fixing and dismantle. It is widely used in all kinds of machinary, especially in food machine and can be used by pharmaceutical machinery,conveyering systems,photo & film processing machinery,dying & printing machinery etc If you are interested in our products, please contact with us. We would be glad to supply samples free of charge. skype: justin_ld