Welded bag ideal for all filtration media. Secure reopenable closure. 180 micron mesh. Resistant to bleach, caustics and acids. The Bag is an innovative filtration bag with a durable welded seam. It has a 180 micron mesh, resists bleach, caustics and acids, and comes with a practical resealable clamp. Available in 13 x 25 cm. It is ideal for all filtration products and has a long service life. Unlike sewn seams, welded seams are not subject to degradation from exposure to bleach, caustics, acids or any other harsh environmental exposure likely to occur during media regeneration. 25 cm handle 25 l.