"THERMOSTATIC OR MANUALLY CONTROLLED,10 VANE 1001 TYPE,RIGHT AHDN CONTROL STEEL FRAME,20.875 IN. H,22.250 IN. W,2.312 IN. THK,TEN 1/4-20 UNC 2B THD WELDNUTS,2 NUTS AT TOP AND BOTTOM SPACED 5.125 IN. FROM CENTER OF NUT TO OUTER EDGE OF FLANGE,3 NUTS ON EACH SIDE SPACED 6.469 IN. C TO C,END NUTS SPACED 3.531 IN. FROM CENTER TO ENDS"