AJ Stationery [P] Ltd. Manufactures Lever Arch / Box Files with Printed Paper Encasement. AJ Stationery [P] Ltd. Supplies paper and paper board stationery. Lever Arch / Box Files with Printed Paper Encasement is made of grey board. The spine area of Lever Arch / Box Files with Printed Paper Encasement is laminated for extra strength. The lower edge of file is reinforced with long metal corners that protect the board from damages. It also enhances the life of the file. These files are fitted with nickel plated lever mechanism.