Vintage quality of products:This hourglass sand timer is consists mainly of glass and wood ,and sand watch has a timing error of about 10%,which is a high standard of the sandglass industry. Suitable for many occasions:Our sand watch have 60 minutes long to be used on many cases,We believe sand glass will be a great friend for the management of work time at the office; Our sand timers also can promote parents to guide the children’s time over study and games.
