Imao’s sprockets are available from a wide variety of materials and sizes.

EIS-S: Plastic Idle Sprockets
・ Heavy-duty
・ Stable rotation with ball bearing
・ Glass-fiber reinforced polyamide body for high wear resistance
・ Applicable to chain No. 40, 50, 60
・ For 15mm diameter spindle
Use with PID1511 Idler Pins.

Materials:
Sprocket body: Glass-fiber reinforced polyamide plastic, Black color
Bearing and Retaining Ring: Steel

Datasheet: https://www.imao.co.jp/files/on-cat/pdf/en/eis-s-e.pdf

Parameter Name	Parameter Value
Teeth	straight-toothed
Other characteristics	for chains polyamide with ball bearing
Diameter (mm)	77 - 86