These acid-free,archival boxes have a neutral pH level of 7.0. The boxes are made of inert, translucent, archival polypropylene. Unbuffered Textile Boxes should be used to store items made of wool, silk, fur and leather. 30" x 18" x 6" - Metal Stayed Unbuffered Textile Box $34.44, 2/$63.00, 4/$119.76, 6/$171.36, 8/$216.96, 10/$259.20, 20/$470.40, 50/$1,119.00 36" x 24" x 8" - Metal Stayed Unbuffered Textile Box $46.80, 2/$91.20, 4/$177.60, 6/$259.20, 8/$336.00, 10/$408.00, 20/$792.00, 50/$1,920.00 30" x 18" x 6" - Inert Polypropylene Textile Box $29.25, 5/$129.50, 10/$252.50 36" x 24" x 8" - Inert Polypropylene Textile Box $35.20, 5/$156.50, 10/$306.00 40" x 24" x 6" - Inert Polypropylene Textile Box $36.25, 5/$161.50, 10/$316.50 48" x 32" x 6" - Inert Polypropylene Textile Box $53.40, 5/$241.25, 10/$448.50 60" x 24" x 6" - Inert Polypropylene Textile Box $55.45, 5/$50.30, 10/$46.90