With the roller you get two assembly straps.

Decorative rivets are made of an alloy of zinc and aluminum, they are cast with a nickel coating, they do not rust, but they may become dull under the influence of weather conditions.
Assembly rivets are made of steel and may rust under the influence of atmospheric conditions.

The formation of so-called "bubbles" filled with air, which form under the influence of atmospheric factors is not a basis for complaint of leather articles! Leather is a tough, flexible material that adapts to conditions (shrinks and stretches), which affects the risk of "bubbles".

As a manufacturer, we take into account all our disadvantages.