How much does this cost to the nearest dollar?

Leak Defender for Kenworths
2pc. Filler Neck Adapter, Collar + Cap. Replaces Your Old, Worn Fuel Cap & Stops Leaks on Kenworth Trucks. Compatible on Kenworth Trucks With a Fuel Neck Diameter of 3.5. Sold individually. If You Have Dual Tanks, You Will Need To Purchase Two. Stops Fuel Cap Leaks Keeps Your Tank Clean Saves on Repair Costs Constructed from Billet Aluminum Brand Leak Defender, Material Aluminum, Exterior Finish Aluminum, Dimensions LxWxH 4.25 x 4.25 x 2 inches, Vehicle Service Type Trucks, Style Modern, Closure Type Twist On, Model Weight 1.57 pounds, Dimensions 4.25 x 4.25 x 2 inches, Country of Origin

Price is $285.00
Price: $284.99