Drive Medical Titanium Gel Foam Cushion for Wheelchairs and Power Chairs Dimensions:18 in. x 18 in. Most circuit breaker manufacturers recommend Q76 0099 Most circuit breaker manufacturers recommend the use of circuit breakers with right angle screw terminals over straight screw terminals for the ease of installation and the increased clearance that remains behind the mounting panel with right angle terminals (also referred to as a throttle potentiometer) The Drive Medical Titanium Gel Foam wheelchair and power chair cushion is a 3 1 2" thick parcel of comfort These wheelchair and power chair cushions also feature a fluid resistant stretch top and a non skid bottom surface for better stability