Boat part number 7103503 is a new barb-to-barb hose adapter from Marine East, part number 8850 . Commonly used on Ranger Boats, part number 305571 , but may be used on other boats.

Features per manufacturer:

Fits sanitation hose
Cuts installation time and labor
High-strength molded construction
This barb-to-barb hose adapter is constructed out of black composite. It measures approximately 1 1/2" Dia. x 2 7/8" L overall. It has (1) 3/4" Dia. and (1) 1 1/2" Dia. barbed hose connections.

Specifications:
Boat Manufacturer: Ranger
Part Number: 305571
Part Manufacturer: Marine East
Part Number: 8850
Material: Composite
Color: Black
Overall Dimensions: 1 1/2" Dia. x 2 7/8" L
Connections: (1) 3/4" Dia. / (1) 1 1/2" Dia. barbed
Sold as seen in pictures. Customers please note every computer shows colors differently. All measurements are approximate.

Hardware and instruction / installation manual not included.