Whitecap Duplex Stainless Steel 90 Degree Thru-Hull w/ BarbThis Whitecap Duplex Stainless Steel 90 Degree Thru-Hull is available in a variety of sizes and includes a barb. These thru-hulls are constructed of durable stainless steel that is more dense and has greater rust resistance than the traditional 316 stainless steel.Specifications:Part NumberHose SizeFlange O.D.Thread LengthBarb LengthOverall LengthCut-OutMax Hull Thickness6576X5/8"1-7/8"1-5/8"7/8"3-1/8"1-5/16"1-1/4"6577X3/4"1-7/8"1-5/8"1-5/16"3-1/8"1-5/16"1-1/4"6578X1"1-7/8"1-5/8"1-1/8"3-1/2"1-5/16"1-1/4"6579X1-1/8"1-7/8"1-5/8"1-1/2"3-1/2"1-5/16"1-1/4"6580X1-1/4"2-3/8"1-5/8"1-1/2"4"1-1/2"1-1/4"6581X1-1/2"2-3/8"1-5/8"1-1/2"4"1-1/2"1-1/4"