The first link is your idler/deflection pulley. The second one is for your tensioner...which I presume means the hydraulic one.
Idler has that funny pin sticking out of it...it is available at Autozone as a Dayco/duralast pulley...and is made by INA, which is the OE maker for us. Call Autozone and get its price on all three pulleys...might save you $ in part and in shipping.
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