Our 6-3/4" Square Shower Head features a flow rate of 1.8 gallons per minute and connects to 1/2" threaded shower arms (included with shower set).Expanding our bath selection means partnering with companies a lot like our own. Watermark, a Brooklyn, NY-based factory, brings you the very best faucet and shower sets around.Do not use cleaners that contain abrasives, harsh chemicals, alcohol, or other organic solvents. Avoid using any cleansers or pads/sponges that are unsafe for polished metallic surfaces. Most green, fibrous pads/sponges contain microscopic mineral particles that can scratch a faucet's finish. Cleaner manufacturers may change their formulations at any time; therefore, Watermark does not recommend any specific cleaner. Immediately after cleaning your faucet, wash off remaining cleaner with water. To remove water spots, use warm water and a soft, damp cloth. Hard water stains can be removed with a 50/50 solution of white vinegar and water, followed by rinsing with water. To preserve the luster of your faucet, occasionally apply a high-quality non-abrasive wax, such as Flitz Faucet Wax +.