This Arri Alexa Vibration- free plate replaces the short plates that have a very short foot-print that often leads to the camera vibrating on most steadicam platforms
This plate screws in securely into the front of the Alexa and spans out to clip into the Alexa's Rear shoe for a tight and secure hold-
I own three of these- selling the backup- includes TWO allen screw that attaches to the Alexa
$250.00