The STIGA 131918550/1 is a genuine OEM blade pulley designed for STIGA Park, Park Pro, and Park Pro 4WD series ride-on mowers. This essential component ensures the smooth and efficient operation of the cutting deck, facilitating proper blade rotation. With an outer diameter of 100 mm, an inner diameter of 17 mm, and a height of 51 mm, this durable pulley is engineered to meet original equipment specifications for reliable performance and longevity.