1.It has two connected vertical glass bulbs allowing a regulated trickle of material from the top
to the bottom.Once the top bulb is empty,it can be inverted to being timing again.
2.Factors affecting the time include the amount of sand,the bulb size,the neck width,and the sand quality.
Shenzhen Minab Houseware co. Ltd located world garden city-Shenzhen ,China .Our location is convenience and with the well-developed transportation connected . We own the capability of R&D , design , manufacturing and sales which we are combined these elements in one company . Our factory – Lian Ming Metal Plastic Factory, Founded in 2000, the factory has professional and technical personnel and management personnel in a number of years in plastic ,metal and silicone .Mainly engaged in the family kitchen supplies ,watches , mobile phone sets , all kinds gifts , such as silicone ,plastic and metal products .We are professional on double injection production such as TPR/PP . TPR/ABS , Silicone/Nylon , Silicone/Metal etc…
We have silicone products : baby supplies ,kitchen supplies ,mobile phone sets ,watches series and others .
Plastic we do : PP,PC,ABS, TPR, NL, POM ,TPU
Metal we do : 304/430/420
We export to USA, Europe ,our product pass FDA and LFGB standard