Install a 34mm expresscard into a 54mm expresscard slot without card slippage the ecbracket2 expresscard 34mm to 54mm stabilizer adapter helps prevent side to side movement of a 34mm expresscard while the card is connected to a 54mm expresscard slot the expresscard 3454 stabilizer can be attached to almost any 34mm expresscard to provide added stability and security for your card adapter including flushmount designed cards the expresscard 34 stabilizer bracket comes in a package of