Capillary Tubes in Holder

For demonstrating capillary action, with four glass tubes of different internal diameters in an acrylic vessel with a white rear panel, filling tube and liquid container. The tubes are 250 mm long, with capillary internal diameters of 0.40, 0.60, 0.80 and 1.00 mm; overall dimensions are 120 × 30 × 260 mm.