The main parts of the products are made of PVC and high quality material.The product is mainly made up of piercing device,air-inlet device, drip chamber,blood filter web, flow regulator,tubing, fluid injection set and sets of needles.The product uses high quality piercing needles without rusty steels. There are two steel needles,one is for air-filter,another is for fluid-inlet.It greatly solves the problem that it is hard to pierce with the plastic piercing needles.