PAIR WITH WALL-MOUNT BATH FAUCETS: This product is required to install Delta 2-handle wall-mount bathroom faucets or Delta 2-handle wall-mount bathtub faucets (sold separately) INSTALLATION: Designed to fit 3-hole, wall-mount configurations with 8 inches between outer hole centers and 2.75" mounting depth DURABLE MATERIAL: Made of durable brass contruction for years of reliability behind the wall CONNECTION TYPES: 1/2-inch female IPS inlets accept PEX or CPVC adapters