Magnetic Probe Rack - MPR designed specifically for the Apex and it will hold the larger diameter temperature probe, pH probe, ORP probe, and salinity probe.
Dimensions - 4" long by 2.5" deep with the screws all the way backed out.
The Neptune MPR can work with glass up to 1/2" thick and keep all your probes secure and safe. By simply placing the MPR in your sump or tank, you can now securely hold all your probes in a single spot.
Features – MPR: