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42 nema 17 stepper motor 2 phase 1.8 degrees 1.5A 3d printer hybrid driver motor stepper step motor 17HB23, US $ 1 - 20 / Piece, Guangdong, China, ACP, 17HB23-1.501.Source from Shenzhen ACP Mechatronics Co., Ltd. on Waimaotong.com.