Arthur Section ARTHUR1 - (M) Curtain Wall Mullion ARTHUR1R - (M) Curtain Wall Mullion ARTHUR1T - (M) Mullion Base ARTHUR2 - (M) Curtain Wall Adapter ARTHUR3 - (M) Curtain Wall Cover ARTHUR4 - (B) Curtain Wall Mullion ARTHUR4R - (B) Curtain Wall Mullion ARTHUR5 - (B) Curtain Wall Adapter ARTHUR5-KN - (B) Curtain Wall Adapter ARTHUR6B - (B) Curtain Wall Cover ARTHUR6S - (B) Curtain Wall Cover ARTHUR18 - Cover Bullnose Stile