Two Parallel Necks Multiple Adapter, 29/32 Socket and 29/32 Cone, Borosilicate Glass Subcategory_Sound and Resonance Low voltage input is via

Low voltage input is via a pair of mounted 4 mm Sockets

Test tube with side arm in borosilicate glass measures 125 x 16mm for gas collection

this metal-base board tensions six 1-meter wires side by side with 4mm socket terminals at each end

95A single-phase rheostat on a 300x56mm tube with cover-protected constantan winding and 4mm safety socket terminals

Dual-range 1V and 5V multiplier for galvanometer conversion

Two Parallel Necks Multiple Adapter, 29/32 Socket and 29/32 Cone, Borosilicate Glass Subcategory_Sound and Resonance Low voltage input is viaMultiple adapter in borosilicate glass features two parallel necks with 29 32 sockets for connecting multiple components in chemistry apparatus.