Root Naturally Jiffy-7 42mm Peat Pellets - 100 Count 100 Pack of 42mm Jiffy-7 Peat Pellets Resealable Bag 42mm diameter x 42mm tall peat pellets expand significantly to 1.75" dia x 1.75" tall Includes Instructions Jiffy-7 Peat Pellets offer quicker rooting due to the air pruning that stimulates fibrous root development within the plug. This can decrease crop cycle up to 25% to produce stronger, more compact plants.