The ABP 1710 is used with the EGO LM1700E. LM1700E-SP. & LM1702E-SP 42cm cut cordless mowers. The kit contains a mulch plug & blade. Mulching cuts the grass clippings into small particles & then deposits them back onto the ground. The ABP1720 is designed to provide the grass with additional moisture & nutrients. so it works best in drier conditions.