3 FT Ceramic Skid Resistant Tile Depth Marker 8 Inch x 8 Inch with 6 Inch Lettering filter-internal-diameter_4 1/16 inches The Rubber Channels should be

The Rubber Channels should be replaced when you notice them missing

This clamp was used on filters manufactured after 12-15-1995 and before 2009

They are 12 inches wide

The door alarm will sound in 7 seconds when a child opens the door

It is available in multiples of 2 (under a separate item number)

3 FT Ceramic Skid Resistant Tile Depth Marker 8 Inch x 8 Inch with 6 Inch Lettering filter-internal-diameter_4 1/16 inches The Rubber Channels should beThis ceramic pool depth marker is printed with 3 FT and has a skid resistant surface. It's overall size is 8 Inch x 8 Inch and has a letter height of 6 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