Specifications
Material : CNC-machined 6061 T6 aluminum with black anodizing finish
SpaceRing 5 Height: 5mm Weight: 4.5 grams
SpaceRing 10 Height: 10mm weight: 9 grams
SpaceRing 15 Height:15mm Weight: 12.5 grams

Specifications
Material : Carbon Fiber - Size: 1-1/8″
BLACKRING 4 Height: 4mm Weight: 2 grams.
BLACKRING 5 Height: 5mm Weight: 3 grams.
BLACKRING 8 Height: 8mm Weight: 4 grams.
BLACKRING 10 Height: 10mm Weight: 4.5 grams.
BLACKRING 12 Height: 12mm Weight: 5 grams.
BLACKRING 20 Height: 20mm Weight: 10 grams.
Features
Carbon fiber with Matte or Glossy finish
Extremely lightweight. . Virtually indestructible carbon fiber.
Available in [...]

Material : made from 6061 AL 
Lengths : 2, 3,  5, 8, 10, 12, 14, 20mm thick
Diameter : 28.6mm( 1 1/8″inchs)
Colours available : Black, Blue, Gold, Red