20mm microfiber faux leather strap & 28mm as well as 12mm spikes. (1 inch = 25mm)

All nickel plated hardware! What contains nickel: Buckle, Screws, Rivets, D-rings, Spikes, Septum Rings & Grommets. 

Stainless steel components: Chain, pendulum points, & O-rings on the bridge pieces.  

 XL will have (3) extra of the 12mm spikes added to each side to fill the extra style space!