Projection Screen 36 x 48" LabLearner 5 inch base with a

5 inch base with a two-tension-setting spring gun and visible internal components

and gastric wall layers in a compact footprint for digestive anatomy teaching

paired with 4mm sockets so iron-filing patterns can be mapped around a current-carrying conductor for Oersted's experiment

Adjustable mass on one fork shifts its 440Hz pitch by a few hertz

Projection Screen 36 x 48" LabLearner 5 inch base with aWall automatic roll back spring action screens (box type casing), with hooks for mounting on walls and an AUTOMATIC roller mechanism for winding. Wall automatic roll back spring action screens (box type casing), with hooks for mounting on walls and an AUTOMATIC roller mechanism for winding. Size : 36 x 48"