Specification Brand : DrAer BulletPoint1 : BulletPoint2 : ✅ 【Replacement Frequency】: Recommend to replace the spare parts frequency to keep your Robotics cleaner working with High-Performance. Enhanced design with bearing eliminates the wheel falling out from wear.Bearings allow the wheel to spin easier and reduces the amount of debris that breaks down functionality over time BulletPoint3 : ✅ Replaces old broken, loose, worn, or missing front wheel caster. Easy replacement snaps in place - A free screw driver with the purchase, and replace the side brush easily. BulletPoint4 : BulletPoint5 : Usually 3-15 Days get Color : Black IncludedComponents : 1x Front Wheel/Caster Assembly, 2x Wheel Tires ItemName : DrAer Replacement Parts Compatible with iRobot S Series S9 (9150) S9+ S9 Plus (9550) Robot Vacuum Cleaner Accessories Front Caster Ball Wheel, Tires ItemPackageQuantity : 1 ItemTypeKeyword : household-vacuum-bags-canister LoadCapacity : 20 Pound Manufacturer : DrAer Material : Plastic ModelNumber : S9 Front Wheel +2 Tires MountingType : Stem Mount NumberOfItems : 3 PartNumber : S9 Front Wheel Tires ProductDescription : Here’s 3 reasons why customers loved our product: