Comparison : Item # 50,198, Steel W1 Square Bar 0.0625x36"
Item # 50,199, Steel W1 Square Bar 0.09375x36"
Item # 50,200, Steel O1 Square Bar 0.125x18"
Item # 50,201, Steel W1 Square Bar 0.125x36"
Item # 50,202, Steel O1 Square Bar 0.125x36"