You Are Buying Russell Brake Speed Bleeader (Bleeder Valve).

Part# 639590

Thread: 3/8"-24

Length: 1.25"

FEATURES:

• Sold Two Per Package
• Makes Brake Bleeding A One Person Task
• Dust Protection Cap
• Uses OEM Style Sealing Area
• Permanently Replaces Original Bleeder Screw
• Unique Double Patent Design