YL-GB001 Grab Bar-Knurled: 1)Material:Stainless ... FinishOD(mm)Thickness of TubingThickness of CoverThickness of FlangeMaterial12",16"…Polished and Peened19,25,32,35…1.2, ... ,…mm1.5,2.5,…mmSUS201,202,304,…12",16"…Polished and Knurled19,25,32,35…1.2, ... .8,…mm1.5,2.5,…mmSUS201,202,304,…YL-GB001 Grab Bar-Knurled is designed to protect ... easier, safer and more comfortable. Most Satisfactory YL-Grab Bar-Knurled