Plain End Single Cone Adapter, 14/23, 5 inch Shank, Borosilicate Glass Ends_Button perforated at 1cm intervals along

perforated at 1cm intervals along 12 axes with six moveable pins for torque and rotational-energy investigations

supplying a duplicate-value option for paired-bench experiments on capacitor energy storage

and 4-pole armature configurations on the same motor frame by swapping interchangeable enameled-copper armatures past a permanent bar magnet on a disc commutator

ground polished edges and optically worked surfaces giving long-bench divergence flexibility in refraction work

Plain End Single Cone Adapter, 14/23, 5 inch Shank, Borosilicate Glass Ends_Button perforated at 1cm intervals alongPlain end single cone adapter in borosilicate glass features 14 23 cone with 5 inch shaft for chemistry apparatus connections.