万向抽气罩（吸顶式、壁式） 关节：高密度pp 材质，可360°旋转调节方向，易折卸、重组及清洗 关节密封圈：不易老化之高密度橡胶 支撑弹簧/ 关节连接杆：304 不锈钢 关节松紧旋钮：高密度pp 制成，内嵌铜质螺母，与关节连接杆锁合 气流调节阀：手动调节外部阀门旋钮，控制进入之气流量 拱形/ 杯形集气罩：直径375mm/200mm，高密度pp 制成，红色、灰色和透明三种选择 伸缩导管：直径75mmpvc / pp 固定架：高密度pp 材质( 吸顶式/ 壁式) fume exhaust(ceiling/wall) joint:high grade pp,to be 360° swiveled,dismantled & assembled easily for cleaning joint seal ring: high-density anti-aging rubber support spring/center bolt:stainless steel 304 adjustable joint knob:high grade pp with a molded-in brass nut locking with center bolt air flow control valve: adjust the external valve knob manually to control the entering of the gas flow dome/cup hood:d375mm/200mm, high grade pp red, grey & transparent available rigid flexible duct:d75mm pvc/pp bracket:high grade pp (ceiling/wall mounted)