Physics Demonstration Loudspeaker Subcategory_Globes Uniform walls provide excellent strength

Uniform walls provide excellent strength against breakage

Convertible motor-generator running AC or DC in shunt or series wound configurations

the protective coating shielding glassware surfaces from nicks

lateral line

Hand-painted 4-part human brain model separates into cortical hemispheres and brain-stem regions for lobed-anatomy teaching at introductory biology levels

Physics Demonstration Loudspeaker Subcategory_Globes Uniform walls provide excellent strengthMoving coil 4 ohm driver in a frame that orients vertically or horizontally, with 4mm sockets that connect directly to signal generators and other audio sources for sound wave demonstrations.