Series 30 Utility Block- Cheek, Curved BaseFeatures:Lightweight durable constructionEconomicalMaintenance freeProduct Information:Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance.Applications:Vang, cunningham and trapeze retriever systems on dinghiesLeech line tackles, bunk adjusters etc on larger yachtsMaterials:U.V. stabilized Acetal sheavesGrade 316 stainless steel cheeks