Projection Screen 36 x 48" LabLearner Designed to grip a wide

Designed to grip a wide variety of optical components on standard bench rails

tapered spout

the polished 90-45-45-degree faces redirecting light at right angles for total internal reflection demos

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

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

Projection Screen 36 x 48" LabLearner Designed to grip a wideWall 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"