2.1 Ceramic Skid Resistant Tile Depth Marker 6 Inch x 6 Inch with 4 Inch Lettering Colorado School Name and Serial No. Covers are made of a

Covers are made of a five-layer system to insulate and protect

Positive nitrate test also indicates the potential for algae growth

Water-powered lifts use a large-diameter cylinder and piston for faster

bacteria and other microorganisms

backwash for multiple filters

2.1 Ceramic Skid Resistant Tile Depth Marker 6 Inch x 6 Inch with 4 Inch Lettering Colorado School Name and Serial No. Covers are made of aThis ceramic pool depth marker is printed with 2. 1 and has a skid resistant surface. It's overall size is 6 Inch x 6 Inch and has a letter height of 4 Inches This ceramic pool tile is printed with ceramic glaze inks, then kiln fired to ensure the finest, most durable depth and safety marker line available. The skid resistant tile is surfaced in the factory, not sanded or coated, for a more reliable slip resistant surface! Skid resistant tiles are for