This is the Trinity Speed Gem Pro Amber 17-Turn Double Version Motor.  The latest D4 and P-94 technology has been incorporated into the best selling, best performing machine wound motors in R/C.

Features:

• FB6 Wet Magnets for a stronger magnetic field
• P-94's bigger brushes for more power and up to triple the brush life
• D4 motor can
• New winds designed to work with the currect generation of batteries
• Dual Ball Bearings
• Adjustable timing
• Three pre-installed capacitors

Includes: One Speedgem Pro Amber 17-Turn Double Motor

Specifications:
Turns: 17 (the number of times the wire is wraped around the armature - The lower the turns the faster the motor)
Winds: Two (the number of strands in the armature wire - Low winds offer more low end "punch"; higher turns "soften" the punch)
Standard 1/8" inch motor output shaft.