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