A i rF l ex | Model 1410 & 1421 Comfort AirFlex Distinct AirFlex design contours to each individual making for the perfect balance of comfort and strength. 84 Series folDIng CHaIrS - STorage anD Tr Model 1410 shown Backrest secured with rivets Design model 84 Modern design enhances any event. Durability Strong 18 gauge steel frame and seat supports makes for long lasting durability. Durable Industrial Grade 3.