Simplex Dual Vert Block Card MTG Kit 4010-9928 part no. 07431174 The 4010ES 1-Bay Dual 4x10 Card Mounting Kit is designed to allow the installation of 2 4x10 cards in a 1-Bay 4010ES. it can only be used with a revision E or later top bay pan (0650473). No Signal Power is provied to the cards on the brackets. All fire alarm parts should be installed and tested by a certified fire alarm professional as required by local codes and NFPA. Disclaimer: We are not affiliated with any fire alarm manufacturers or dealers. We offer high quality new and seller reconditioned reliable fire alarm parts to help you maintain your existing fire systems. We buy, sell, and liquidate excess fire alarm parts. We are selling a huge amount of new alarm equipment! Please take a look at our other listings! *WE CAN WORK OUT A DEAL FOR BULK ORDERS* SHELF: B