As an Amazon Associate, we earn from qualifying purchases. MPR Magnetic Probe Rack - Bulk Reef Supply Neptune Systems . 208405 Gallery Attributes Brand name, Manufacturer name, ManufacturerNeptune Systems Extra Product NameMPR Magnetic Probe Rack - Bulk Reef Supply extendedQty, qtyInStock0 keywordssaltwater aquarium supplies, reef aquarium supplies, marine fish tank, live rock, GFO, protein skimmers, two part dosing, aquarium carbon, fish food, RO/DI Systems, ecotech marine, aquaillumination, neptune systems, kessil, innovative marine moq, multiple, tierMinQty11 MPN, SKU208405 qtySourceupdateFromUrlEntry snippetNeptune Systems designed the MPR - Magnetic Probe Rack specifically for the Apex. It will hold the larger diameter temperature probe, pH probe, ORP probe, and salinity probe. Made from acrylic and with strong neodymium magnets Works securely on sumps and aquariums up to 1/2 thick Dimensions - 4 long by 2.5 deep with the screws all the way backed out. Neptune has designed a Magnetic probe rack that will hold up to 4 probes with one hole being slightly over-sized to hold those larger probes like the Neptune temp probe. By simply placing the MPR in your sump or tank, you can now securely hold all your probes in a single spot. If a probe is left loose their is a good chance it may float with the business end being exposed to the air and cau tierPrice144.95 Distributor offers SellerSKUMOQIn stockMultiplePrices bulkreefsupply.com208405111 @ $44.95