Patented heavyduty weight bearing wings to provide extra working space. Each wing holds up to 40 lbs (18.2 Kgs) and provides additional working space of 20 x 15 inches (50.8 x 38.1 cm) per side. Designed to mount easily on the top of your rig when you need them and fold away snuggly into any of our slant rack systems (6u and up) when you don’t, all RRMW wings come in a 1U metal rack mount storage tray for convenient transport. Dimensions: 2 h x 19 w x 19 d inches (5.08 h x 48.26 w x 48.26 d cm).