Item is as pictured. Includes pair of aluminum hubs and red polyurethane spider with 98 shore hardness.

HUB SPECIFICATIONS
DIMENSIONS
Length (L)	1.390 in (35.3mm)
Outer Diameter (OD)	1.000 in (25.4mm)
Hub Width (LH)	0.467 in
Bore (B1)	0.3750 in
B1 Max Shaft Penetration	0.467 in
Bore Tolerance	+0.001 in / -0.000 in
Keyway (K)	3/32 in
Key Width (K1)	0.0938 in
Key Height (K1)	0.0938 in
Keyway 1 Height (T1)	0.4209 in
Keyway 1 Width Tolerance	+0.0020 in / 0.0000 in
Keyway 1 Height Tolerance	+0.0100 in / 0.0000 in
FASTENING HARDWARE
Forged Clamp Screw	M3
Number of Screws	1 ea
Screw Material	Alloy Steel
Screw Finish	Black Oxide
Hex Wrench Size	2.5mm
Seating Torque	2.1 Nm
PERFORMANCE SPECIFICATIONS
Torque Specifications	Ratings vary with insert selection
Misalignment	Ratings vary with insert
Maximum Speed	8,0000 RPM
Moment of Inertia	0.00507 lb-in²
Full Bearing Support Required?	Yes
Zero-Backlash?	Yes
Balanced Design	Yes
Fail Safe?	Yes
ADDITIONAL INFORMATION
Weight	0.033900 lb
Temperature	-10°F to +180°F (-23°C to +82°C)
Material Specification	2024-T351 Aluminum Bar
Finish	Bright
Finish Specification	Bright, No Plating
Recommended Gap Between Hubs	0.030 in (0.75mm)
Country of Origin	USA
CERTIFICATIONS/STANDARDS
ISO 9001:2015	Certified
Conflict Minerals	Compliant
RoHS3	Compliant
REACH	Compliant
SPIDER SPECIFICATIONS
DIMENSIONS
Out Diameter (OD)	1.000 in (25.4mm)
ADDITIONAL INFORMATION
Weight	0.006400 lb
Temperature	-10°F to +180°F (-23°C to +82°C)
Material Specification	Polyurethane 98 Shore A (Red)
Finish Specification	Plain