... . size 9 x3x7.8cm 5. OEM service stainless steel sand timer, 1. Holder material: stainless steel, glass sand, PP tube2. ... : 1.) We are the professional factory who produce the sand timer, hourglass (hour glass), sandglass (sand glass) with different framesMetal ... . Limit conversations with co-workers by timing their visits. Sand clocks are also useful during meetings for timing speakers and playing ...