Abstract: A spacer element is provided to support an anode on a metallic reinforcement bar, such as a rebar. The spacer element includes a bar supporting body and an adjustable fastening body that are integrally formed, and a separate anode supporting body that is connectable to the bar supporting body. The bar supporting body includes a circumferential wall having resilient tines that extend radially inwardly to engage the rebar. The adjustable fastening body includes a toothed rib that is engageable with a toothed portion of the circumferential wall to contract the circumferential wall securely around the inserted rebar. The rib may be disengaged from the circumferential wall to open the wall and enable insertion of the rebar. The anode supporting body has a resilient prong that is rotatable when received in the bar supporting body enabling the anode supporting body to be rotatable relative to the bar supporting body.