1.9" O.D. x 16 gauge galvanized steel roller with 7/16" hex steel spring retained shaft and precision Abec 1 bearings. Roller is covered with 1/8" thick polyurethane sleeve. Abec 1 bearings have significantly lower noise levels, longer life, and are usable up to 2,000 RPM.
Construction:
Tube: 1.9" O.D. x 16 ga. galvanized steel
Axle: 7/16" hex steel
Bearing: Precision Abec 1, swaged
Axle Retention: Spring retained
Weight: .42 + (.16 x BF)
Shaft Length: BF+1-9/16"