- Boat trailer parts
- Fiberglass boats
- Australian made plastic
6 Inch Red Soft Concave Boat Trailer Keel Roller Polyurethane 6 Inch red soft polyurethane concave keel roller, designed for fiberglass boats and hulls. 155 x 60 x 17mm bore  Note: Image for display purposes only. Product may vary slightly. 6" concave roller style is same as the blue variation.