FPC-5442 One Door Access Control 2,200lbs Electric Drop Bolt Fail Safe For Glass Door and Glass Frame with Visionis Wireless Receiver and Remote Kit - Walmart.com
BinMaster MAXIMA+ Fail-Safe Rotary Level Indicator Kit with single-vane paddle and side mount shaft coupler
Access Control Electric Strike Door Lock Fail-Secure/Fail-Safe Kit System, Door Buzzer Entry System, with Remote Control, Button, Buzzer, Power Adapter - - Amazon.com
Visionis FPC-7461 One Door Access Control 770lbs Electric Door Strike Lock Fail Safe Kit with Wireless Receiver and Remote System - - Amazon.com
Fail-safe LS Rocker Arms with this Needle Bearing Upgrade Kit.