SPARE || Pack of 2 replacement light bulbs for ELabs Demonstration Motor Generator Activity Model (AC/DC) (PH1245N8) CURRENT || When combined with demonstration activity model, produces AC and DC current on the same device - Switchable between AC and DC VISUAL DEMONSTRATION || A great visual demonstration for physics classrooms DURABLE & STURDY || Made of high quality materials designed for multiple uses Pack of 2 replacement light bulbs for ELabs Demonstration Motor Generator Activity Model (AC/DC) (PH1245N8). When combined with demonstration activity model, produces AC and DC current on the same device. Switchable between AC and DC. A great visual demonstration for physics classrooms. Made of high quality materials designed for multiple uses. ELabs proudly manufactures its own products using state-of-the-art equipment, and following the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade, raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.