Projection Screen 36 x 48" LabLearner Designed to electrolyze water into

Designed to electrolyze water into separately collected hydrogen and oxygen

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

providing a measurable projection surface for sizing real images formed by lenses and concave mirrors

tapered spout

sized for individual student-lab use in simple-machines units

Projection Screen 36 x 48" LabLearner Designed to electrolyze water intoWall 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"