| Item# | 
              Dimensions
                of O. S. Tubes | 
              Gauge | 
              Material | 
            
            
              | 168 | 
              Split
                Tube Moulding 3/8" Dia. | 
              20
                Ga. | 
              SS
                T304-MF | 
            
            
              | 169 | 
              1"
                Sq. OS Channel w/.260 Opening | 
              16
                Ga. | 
              CRS | 
            
            
              | 169A | 
              7/8"
                Sq. OS Channel w/.260 Opening | 
              16
                Ga. | 
              CRS | 
            
            
              | 169B | 
              1"
                Sq. OS Channel w/5/16" Opening | 
              16
                Ga. | 
              CRS | 
            
            
              | 226 | 
              5/8"
                Sq. OS Channel w/.150 Opening | 
              18
                Ga. | 
              CRS | 
            
            
              | 226A | 
              5/8"
                Sq. OS Channel w/.250 Opening | 
              18
                Ga. | 
              CRS | 
            
            
              | 233G | 
              5/8"
                x 1" x 5/8" OS Tube, w/5/8" Opening | 
              18
                Ga. | 
              Galvanneal | 
            
            
              | 233M | 
              5/8"
                x 1" x 5/8" OS Tube w/ 9/16" Opening | 
              20
                Ga. | 
              CRS | 
            
            
              | 233MG | 
              5/8"
                x 1" x 5/8" OS Tube, 3/8" Return w/5/8"
                Opening | 
              18
                Ga. | 
              Galvanneal | 
            
            
              | 233MS | 
              5/8"
                x 1" x 5/8" OS Tube, 3/8" Return w/5/8"
                Opening | 
              18
                Ga. | 
              SS
                T304-#4 POL | 
            
            
              | 238 | 
              1-3/16"
                OD OS Tube w/3/16" Opening | 
              22
                Ga. | 
              CRS |