Over Mount Installation 17 in. x 25 in. ABS Single Shelf Bathroom Recessed Shower Niche for Shampoo, Toiletry Storage PVC Trim hard surface Self Adhesive No Floating hard surface Self Adhesive No Floating Yes Warranty Limited lifetime residential 10 year commercial Actual Width (Inches) 20 Actual Length (Inches) 20 ARB265W Exclusive No CA Residents: Prop 65 Warning(s) No For Use Over Tile Yes For Use Over Wood Yes Water Protection Water resistant Finish Type Medium Installation Type Interlocking Length Measurement 20 in Color Shade Medium Color Finish Family Multiple colors finishes Thickness Measurement 5 mm UNSPSC 30161700 For Use Over Vinyl Yes Actual Thickness (Millimeters) 5 Use Location Indoor Sample Available Yes Width Measurement 20 in Textured Yes For Use Over Cork Underlayment Yes Corresponding Moulding Item Number N A For Use Over Concrete Yes Wear Layer Thickness (Mils) 0 811 Actual Length (Inches) 5 Inside: 14 ) 3 lb Product Depth (in