21 Double button upgrade kit for the Sam4s ER945 ECR

The 21 double department buttons replace the 56 single buttons which are fitted on the keyboard as standard, resulting in 3 columns of 7 double buttons

To complete the kit, 2pcs 7X1 Vertical keyboard blanking plates (KY-0000084) are also required

Also suitable for the Sam4s ER925 ECR