Element Box NF-820

Dear Sir, Here are brief introduction of our company: www.zaifeng.comSHENZHEN ZAIFENG ELECTRIC TOOLS CO.,LTD.is a company especially dealing with electric tools,hardware,plastic products,instrument ,appearance ,electric products and some assistant material products.Your early reply will be highly appreciated.Best regards!Cathy Lee 13828708585Can be fixed each other;Can be extended the height between Two boxes by Four,extra rods to get more space for storing goods.