Published October 8, 2020 at 1164 × 419 in Cal/OSHA’s Retort to Feds on Diving From left to right: Quadbar, Quadbar Flexi and Lifeguard crush protection devices. From left to right: Quadbar, Quadbar Flexi and Lifeguard crush protection devices. From left to right: Quadbar, Quadbar Flexi and Lifeguard crush protection devices.