Low resistance triangular multi - Angle spiral packing rectifying tower Large triangular spiral experimental packing Rough triangular spiral test packing Pure titanium experimental packing Mini wire mesh corrugated packing Stainless steel θ ring packing (single layer) Stainless steel θ ring packing (double layer) Low resistance triangular spiral packing Half of the packing Titanium wire triangular spiral packing Rectangular spiral packing Metal calendering hole packing (round) glass spring packing Stainless steel spring packing Polygonal spiral packing Copper round spring packing Nautical pike packing Metal Dole ring Superlacey ring Metal butterfly ring Metal double conjugated ring Stainless steel flat ring Metallic sodium ring Eighty-four inner arc ring Metal step ring Stainless steel flat ring Metal Pall Ring Metal saddle ring Stainless steel conjugate ring The metal wreath Metal flat ring Stainless steel Interlock packing Metal Raschig Ring