HIGH QUALITY MATERIAL: Wood and sand are made of high quality and tested materials. The wood warps and in the heat and the sand does not stop or stick to the sides.INTELLIGENT DESIGN: The sauna clock guarantees a healthier sauna. With contrasting colors, you can still see a clear image a few feet away. With a sauna of adequate length, you can effectively strengthen the immune system and the cardiovascular system.HEAT-RESISTANT GLASS: The glass of the hourglass is made of high-quality, heat-resistant glass. So the hourglass remains functional even at high temperatures.EASY ATTACHMENT: Suitable for every sauna: two screws are supplied with which the hourglass can be easily attached to the wall. Thanks to the countersunk in the wood, they do not interfere with the rotation of the hourglass.WIDE USE: This hourglass can withstand the hot and steamy environment of a sauna, it can also be used in other purposes such as in classrooms, yoga or exercise rooms, or for other timed purposes. Features: - Wood and sand are made of high quality materials and tested. - Therefore, it not only guarantees the safety of the sauna, but also uses it for a long time. - Sleek box design holds the hourglass in place, adding a stunning visual to your sauna. - It can be installed by punching it on the back and rotating it 360 degrees. You can also add glue if needed. - Can be used as children's toys, family decorations, board game card synchronization, sauna synchronization. Specification: Material: wood + glass tube + sand Size: 29 * 5 * 3 cm / 11.4 * 1.9 * 1.1 inch Color: White + wood Scope of delivery: 1 * hourglass 2 * screws