Material and sinking capability Made of a special plastic material with added weight so the cleaning head can completely sink to the bottom for thorough cleaning. Weighted design provides easy underwater maneuverability, enabling effective cleaning of pools, sauna pools, aquariums, water parks, standard pools, and landscaped pools. Universal installation Suction ports are compatible with standard 1.2 inch and 1.5 inch suction hoses. The handle features a springloaded locking clip for easy connection to extension rods. Triangular shape The triangular cleaning head design allows easy access to hardtoreach corner areas, making it practical for regular cleaning. The weighted head can sink directly to the pool bottom and stay there until cleaning is completed. Flexible action A small, flexible brush with a swivel joint helps reach difficult corners, with bristles designed to remove stubborn dirt. This enhances overall cleaning performance across irregular surfaces. Use scenarios 1) Cleaning large inground or aboveground residential pools, including corners and pool bottoms, to remove sediment and debris. 2) Cleaning spa or sauna pools and landscaped water features where deeper reach and bottom cleaning are needed. 3) Cleaning aquariums or other water features that use standard suction hoses, using the weighted head to reach and clean the bottom efficiently.