3/8" Male BSP thread, 17 mm wrench, 31 mm tall. For La San Marco, this threads directly in to the pump head, to connect to the 6 x 4 mm tubing. For LA SAN MARCO serie 85 - 95 - 105. See also: V_1768.
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.