colorfull metal twist plunger with 1ml glass syringe set bottle luer lock and head 4 colors packaging glass container for thick co2 oil cart

products specification of s1 syringe: 1. tube is the glass material, plunger is metal and can be heated directly. better corrosion resistance 2. better sealed. 3. about 1ml capacity, this metal twist plunger is a two-component tool made to use with glass syringes. the purpose of the two components is the capability it has to close pre-filled syringes. with a standard plastic plunger, when a slipsealed or locked syringe is closed, it will cause the plunger to pop out from pressure. the metal twist plunger solves that issue, and it looks nice too.syi