Rotary Corp brand aftermarket product. 532 16 56-30 Composite Flat Idler Pulley with Offset Hub. Also replaces AYP/ 532165630 and 165630. Fits some models including CT130, CT150, CT151, CT160, CTH130, CTH135, CTH150 XP, CTH151, CTH155, CTH160, CTH170. CTH171, CTH172, CTH180 XP, CTH191, CTH200, CTH210 XP. Also fits McCulloch, Partner, Flymo, Craftsman, Poulan Pro, Fits Weedeater.