Made of stainless steel 304, which is resistant to corrosion and rust. It has a size of 1/4" (6.4 mm) and comes in a box of 100 pieces Aazon.co: WHNL Electric Baby Bottle Brush with Holder, Stainless [New Electric Bottle Brush Cleaner]2-Speed Cleaning Mode, 360°high-speed automatic rotation cleaning,thorough cleaning and time-saving and labor-saving. Versatile 2 Modes & 360° Rotation for comprehensive cleaning; Includes 4 Replacement Heads to accommodate all bottle sizes; Long-lasting 90-minute Battery... [Non-Slip And Waterproof Electric Bottle Cleaner]Ergonomic design for easy-grip handle, IPX65 waterproof design, charging port with silicone plug. [Electric Silicone Bottle Brush]The bottle brush heads made of safe and durable material, No odor, no BPA, no hair shedding,can be sterilized at high temperature . [Perfect Gift for Mom]The baby bottle brush electric must be given to the mother and father who are about to or are working hard to clean. Bottle Drying Rack Electric Cleaner Set, Electric Baby Cleaner Bottle Brush
