Describe:
100% new and high quality
Material:ABS
Color: as picture
Size:Inner diameter 3MM, outer diameter 4MM
Function: Suitable for all kinds of DIY reactors, directly screwed carbonated beverage bottles, mineral water bottles, safe, durable and airtight.
Package include: 2pc Guage Bottle Cap
The details are real, the design is convenient and the workmanship is good