Features: Made of 304 stainless steel material, which can provides strength and offers good corrosion resistance in many circumstances. Widely applicable for mechanical devices, clamps, molds, automatic machines, etc. They are great parts for providing pressure and accurate positioning. Easy to install and convenient to use, simply press it in for fastening. There are total 5 pieces of ball plungers in one set that you may use for many projects. Specifications: Material: Stainless steel Body Size(Dia*L, excluding ball): 8mm*9mm Item Size(Dia*L, including ball): 8.5mm*11.4mm Quantity: 5pcs Weight: 15g(approx.) Package Includes: 5 x Ball Plungers Note: Please allow small size error due to manual measurement. Thanks for your understanding. 1、Made of 304 stainless steel material, which can provides strength and offers good corrosion resistance in many circumstances 2、Widely applicable for mechanical devices, clamps, molds, automatic machines, etc 3、They are great parts for providing pressure and accurate positioning 4、Easy to install and convenient to use, simply press it in for fastening 5、There are total 10 pieces of ball plungers in one set that you may use for many projects