3Min 4Dk 5Dk kum zamanlayıcı reçine kum saati

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.

1. Print logo on both ends

2. Product logo can be imprinted on the panel

3. Custom size, color sand, color lid