Description
Guko Adapter ‘UNI-STOP’.
This is an innovative product designed to replace all similar adapters. Each one is made using premium and heavy duty silicone to ensure lasting usability and best performance.
Reverse grip-ribs for maximum seal
Universal, fits multiple neck sizes
Internal barb seal, for ease of neck insert
Price is for one.
For alternative Silicon Stopper option, click here
Wikipedia info