Features 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 20 pieces of ball plungers in one set that you may use for many projects. Specification 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 20 pieces of ball plungers in one set that you may use for many projects. Specifications: Material: 304 Stainless steel Size(Dia*L,): 2*3mm/0.08*0.12in, 3*4mm/0.12*0.16in, 4*5mm/0.16*0.2in (Optional) Quantity: 20pcs Weight: 4g Package Includes: 20 x Ball Plunger Package List