Quantity: 2
M6 Titanium Barrel Nuts for windsurfing, hydrofile, kitefoil, fin, bike
Material: Titanium. 
Thread: M6, 
9.9 mm outside diameter. 
15.8 mm long.
Light weight.
Does not corrode. 5 times stronger than Bronze. Practically unlimited life span. No galvanic corrosion with carbon and aluminum
Unlike Bronze Titanium does not change color. Remains new look even if used in salt water.

Shipping:

USPS - free but unreliable. 1 out of 50 packages delivered 1-4 weeks after estimated by eBay.

UPS - $9 flat rate. Delivers every package as promised on the listing or faster.

UPS 2nd Day Air- $20 flat rate. Fast and reliable. 

UPS Next Day Air - $40 flat rate. The fastest and reliable.