Cimpress N.V. struck a deal to acquire National Pen Co. LLC, a San Diego-based manufacturer and marketer of custom writing instruments for small and medium-sized businesses.

Under the terms of the agreement, Cimpress will acquire all of the outstanding equity interests of National Pen for about $218 million, subject to customary adjustments for net debt and working capital.

Cimpress expects the transaction to close by the end of December, subject to various closing conditions, including clearance in the U.S. and Germany.