STOLTZ Super Roll keel reel RP-8 rely on quality. Stoltz keel rollers are made in the USA from polyurethane. They offer the following advantages: - The wheels are very smoothly running, thus allowing easier slipping. - Due to the use of polyurethane, the rollers are very weatherproof and UV resistant, even with prolonged use will not crack. Much more durable than rubber or PVC wheels – Proud wheels leave no stripes on the hulls, your boat stays nice white! Dimensions: width 200 mm, hole diameter 16 mm.