Russco III GD137425 Galileo Thermometer (22 in. Length), Medium, Oil Rubbed Bronze Educational and fun thermometer invented 400 years ago by Galileo Galilei This outdoor thermometer's multi-colored fluid-filled glass globes Rise and fall as the temperature changes Metal cage with a large hook for hanging 22.5 inch length Not recommend for temperatures below freezing. Assemble thermometer outdoors. Liquid is paraffin oil. Do not get on skin if glass is broken