Replacement Roller, Type Medium Duty, Dia. (In.) 1.9, Between Frame (In.) 29, Shaft 7/16" Hex Plain Steel, Bearings Light Oil Lube Steel Ball, Finish Zinc Plated Steel Housing, Capacity (Lb.) 270, Mounting Spring Retained, Construction 16 Gauge Galvanized Steel, Package Quantity 1Features:Bearings -Light Oil Lube Steel Ball Finish -Zinc Plated Steel Housing Capacity (Lb.) -270 Mounting -Spring Retained Construction -16 Gauge Galvanized Steel Package Quantity -1 WARNING: California Residents:This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer and birth defects or other reproductive harm.California proposition 65 warning