Model: 3615ML-04W-B76 Bearing: Double Ball (2 Ball Bearing with Special Designed IC Inside) Size: 90*90*38 Mean Time Between Failure (MTTF): 180,000 hours Rated voltage: 12V Operating voltage range: 12V Current: 1.60A Speed: 6500rpm 10% Air volume: 1160CFM Line length: 25 cm (4-wire supports PWM automatic speed control function) Features: Overwhelming long working life, 180,000 hours of MTBF; uncompromising high-precision, high-quality parts! Features: High-speed IC loading specially designed with 'NMB-MAT Silent IC Series', high air volume for high temperature environment.