GROCO Bronze Combo Scoop Thru-Hull w/Nut 1-1/2". 1-1/2" Bronze Combo Scoop Thru-Hull w/Nut Specifications for GROCO 1-1/2" Bronze Combo Scoop Thru-Hull w/Nut: Manufacturer: GROCO Color: Black Features of GROCO 1-1/2" Bronze Combo Scoop Thru-Hull w/Nut Designed for increased flow compared to standard Thru Hulls NPSM / NPT combination thread C83600 Bronze Thread NPS: 1-1/2" Package Contents: GROCO 1-1/2" Bronze Combo Scoop Thru-Hull w/Nut GROCO STH-1500-W: Bronze Combo Scoop Thru-Hull w/Nut 1-1/2"