Brake Caliper Bleeder CapHigh Tensile Anodised Aluminium Bleed Nipple Cover.Hide unsightly usually rusty (unless you have fitted Pro-Bolt Titanium or Stainless Steel) bleed nipples, supplied with an O-ring to keep out dirt.Functional and good looking.Thread Diameter 7mm, Outside Diameter 12mm, Height 17mm, Package Contains 3pc