Containing magnetic components、 can be adsorbed by magnet ( you can change the shape of the magnetic fluid in the bottle by using extra magnet、 there are countless playing ways ) Perfect for office workers and other high pressure persons、 can relieve stress by playing this magnetic decompression toy ?You can use two ferrofluid bottle at the same time to get better adsorption show Dimensions: 2.36 in x 0.98 in x 0.98 in (6.0 cm x 2.5 cm x 2.5 cm) Weight: 0.92 oz (26 g)