Ships Today This is a compatible dual-action brush for iRobot Roomba i, j, and e series. ● Replacement Frequency: Recommended every 6 months to 1 year. *May vary depending on usage and environment. ● Compatible Models: iRobot, Roomba i Series (i2 i3 i3+ i4 i4+ i6 i6+ i7 i7+ i8 i8+) j Series (j7 j7+) e Series (e5 e6 e7) ● Quantity: 2 brushes (Green x 1, Light Green x 1) ● Size: Length 19cm Diameter 2.6cm *Slight variations may occur ● Replacement Method: ① Push the lever on the frame inward and lift it up. ② Remove the old aero brush. ③ Install the new aero brush, matching the color and shape of the illustration on the main unit. ④ Close the frame and you're done. ● Shipping: Ships Today ● Packaging: Will be placed in a plastic bag and sent in an envelope. ● Other: As this is a compatible product, there may be some slight imperfections compared to the genuine product. Please understand the above before purchasing.