This is a drive unit (motor) for E5 Silenflo pumps. Very easy to replace the dive unit: just rolls of the union fixing the drive unit of old pump (pump house stays fixed in on the spa), disconnect the electrical cables and connect them to the new drive unit as it was, put the new drive unit into the old pump house and fix it by the union. Repair work done Drive unit delivered with union but without cableOld part number: LHB08110018, LHB08110012, 74050, 34-158-1250 (Horizon) _Technical informations:Connection: nonWeight: 0,4 kgDimensions: 85mm x 60 mmSpeed: fix 24h, Power: max 39W House: N/AProtection: NoMax Pressure: 2 barMax flow: 950l/hMax head: N/A Current: 100 - 230V (50/60Hz)Rotation: N/AElectrical connector:  without cable, use the cable of the old pumpCable: noNoise: less than 50 db