This Grab Bars Are Ideal for Safety Assistance near Any Bathroom Wall, Tub or Shower.Concealed Screw Grab BarColor: White and Yellow.Material: Nylon + Stainless Steel.Size: 15/19/23InDurable Materials:Anti-Bacteria Nylon Material for the Outer Tube; Impact-Resistant, Corrosion-Resistant and Colorfast Stainless Steel Material for the Inner Tube.Safety Grip:with Raised Lines on the Surface to Prevent Sliding,Ng Enough to Support 300 Pounds.Humanized Design:Anti-Static, Comfortable to Hold in Winter, with Luminous Circles Added.Wide Application:Suitable for Various Sites: Bathroom, Lavatory, Corridor, Etc.Note: the Luminous Circles Need Exposure to the Sun Before They Glow in the Night.? Measure the Size Manually, There Will Be Some Errors, Please Understand.? Thank You for Coming to Our Store to Choose Your Favorite Products, I Wish You a Happy Shopping.