Check the listing for details. ButtonWorx™ QTY 20 of 4mm round conductive dots. Condition: New. Listed at 4.95 USD. ButtonWorx Universal Button Repair 4mm QTY: 20 of the most common size 4mm dot 4mm round contactBest for 2 to 3mm rubber contact pointsOutside dimension: 7mm square Never wears out! *Satisfaction Guaranteed*No glues, epoxy or paintWill not chip, scratch, peel or fall offTested over 1 million button pressesEasy peel and stick applicationCan be cut down some with scissors for tighter spaces Google search: Universal_buttons_instructions.pdf This button repair works in most rubber keypad contact switches to restore like-new button functionDoes not work for snap-dome metal switchesIf your keypad is made with rubber contacts for the switch (with or without plastic key caps) this is what you need to restore function permanently. BUT since there are countless designs of rubber buttons there may be some that are too tightly packed or unusual construction that do not allow a universal button to operate properly. If this does not work for what you need - LET ME KNOW! I will do my best to help you and if we can solve it, the solution can be added to the product line. Your browser does not support the embedded video