M10*1 Threaded Tube For Lamps Screw Hollow For M10 Tooth Tube Inner Hollow Threaded Bar Rod Lighting Accessories Fixed Base Lamp Product Name:Hexagon headed teeth tube Tooth pitch: 1mm Thread type: M10 Length: 8-18mm Material: metal Features: Hollow threaded tooth tube Application range: mainly used in lighting fixtures accessories, no longer appropriate for different mechanical applications