INCHES DEEP Message Ceramic Skid Resistant Tile Depth Marker 6 Inch x 6 Inch max-length_5 Feet and the manual

and the manual

This is a PVC Reducing Tee Fitting with slip (socket) fitting connections that measures 5 x 5 x 4 Inch

the Pro Fix Seam Adhesive is used to close those gaps

The PRO 2000 comes with two 15 inch vacuum heads (one for vinyl liner and one for gunite pools)

INCHES DEEP Message Ceramic Skid Resistant Tile Depth Marker 6 Inch x 6 Inch max-length_5 Feet and the manualThis ceramic pool depth marker is printed with INCHES DEEP and has a skid resistant surface. It's overall size is 6 Inch x 6 Inch and has a letter height of 2 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