Arlen Ness 10-Gauge Gas Cap For Harley As Arlen Ness being one of the first manufactures to billet gas caps they know what they're doing. These 10-Gauge gas caps are sleek and go hand in hand with any of their other 10-Gauge products. Features Cap top is CNC machined from billet aluminum Exclusive ratchet design provides proper torque and design alignment Sold individually