Solid Valve - Fine Screen Set Includes - Set of 3 upper and 3 lower stainless steel Fine Screens for the vaporization of powdered materials in the SOLID VALVE Filling Chamber, also including an additional nut and washer 3 pcs. Upper Screen with hole (approx. � 24 mm) 3 pcs. Lower Screen without hole (approx. � 26 mm) 1 pc. Nut (M2) 1 pc. Washer