These are the 6.5mm High Current Bullet Connectors from Castle Creations.
FEATURES: Gold plated
Fits wire diameter up to 6.5mm
Use 13-8 gauge wire
Up to 200A current
INCLUDES: Three sets of bullet connectors
SPECS: Length: .59" (15mm)
Inside diameter: .15" (4mm) (where the wire is soldered to)
Outside diameter: .25" (6.5mm)
