1A DC Interchangeable Dial for Demonstration Meter Metal Labware_Metal Bases & Rods Aluminum-cased plotting compass with a

Aluminum-cased plotting compass with a glass face and a dial marked with principal points

Compact 300mm black lead with a 2mm banana plug at one end and a crocodile clip at the other

Hand-painted dicot root transverse section model exposes epidermis

Hand-cranked Van de Graaff generator with a 9

Hand-cranked worm-and-wheel drive with a rotation dial between clear acrylic plates

1A DC Interchangeable Dial for Demonstration Meter Metal Labware_Metal Bases & Rods Aluminum-cased plotting compass with aOne amp AC scale on a 315x115mm laminated panel with sealed shunt, dropping into the demonstration meter as a 0 1A AC ammeter for transformer and household current measurements.