1.05 Bottom Segmented Standard Mesh Distributor 010" -.013" slotsUsed to make Distributor Tube using 3/4" PVC Pipe by cement this distributor to pipe and cutting to desired length.Only to be used in special applications.Use of a gravel under bedding is recommended when tank diameter is 14 or 16 inches, and a Flow Rate of over 8 gpm is expected ( small commercial applications, not residential ).