Quantity: comes with 10 pieces battery anti-corrosion washers(5 red & 5 green) and 2pcs Battery Terminal Cleaning Brush. Features of Battery Terminal washers protector: the battery washers can prevent corrosion around the battery terminals, prolong battery life, for use with 6 and 12-volt battery,the color coded for positive and negative terminals, red for +, green for - Size of Battery Terminal washers protector: inner ring can be removed to fit larger terminals, outer ring diameter is approx. 44 mm/ 1.73 inch; Inner ring diameter is approx. 20 mm/ 0.79 inch; Diameter of inner ring after dismantling: approx. 30 mm/ 1.18 inch Battery Terminal Cleaning Brush-Stainless steel metal brush cleans corrosion build up on cables and batteries,Works on positive and negative battery posts, extenders, adapters, connectors, shims, and cable clamps. Battery Terminal Cleaning Brush-Strong metal construction with premium nickel plated housing,Cap covers brush for easy storage and locks closed - Pocket Sized Tool