Sierra International 18-7777 Stainless Steel Fuel Water Separator Bracket, Universal Design with 1/4" Thread Sierra Brackets are Precision Machined Powder Coated Marine Grade Stainless Steel Material: Stainless Steel Thread Size: 1/4" or 6.4mm Replaces: Yamaha Outboard MAR-FLTHD-SS-12 All Sierra parts qualify for and are covered under Sierra's Industry Leading Customer Satisfaction Warranty Before Ordering, Please Verify this is the Correct Part for your Application. For Assistance, Please Call Sierra's Tech Support at 1-877-663-8396