... 3.size:25mm, 35mm, 50mm, 76mm Thin Wall Metallic Raschig Ring 25mm, 35mm, 50mm, 76mm Since 1914 when ... F.Raschig invented this type of ring for tower packing, random tower pickings have been ... The R-ring is now used in many applications, but particularly in supporting catalyst beds.Metallic Raschig Rings ... .23001600659690×90×1.0236116062 Thin Wall Metallic Raschig Ring 25mm, 35mm, 50mm, 76mm