Check the listing for details. MAGNETIC Probe Holder aquarium fish tank reef. Condition: New. Listed at 42.99 USD. My products are made to order, custom! Please allow up to 10 business days for fabrication time for most products. Because my products are made to order, fulfillment time can rarely take longer. Please do NOT order if you cannot wait!!! Full custom orders can take up to four weeks to complete. Please let me know ahead of time if this may be an issue. Shipping prices listed are to the contiguous U.S. Please contact me if you live elsewhere and want a shipping quote. Because my products are handmade and/or hand assembled, there may be small irregularities (fingerprints, marring, hair, etc) which will not effect the performance of your product. Don’t fall for wimpy magnets! I revolutionized the usage of high-powered magnets in our industry! Made from 3/8″ clear acrylic and can hold on 3/4″ glass! All four holes are large enough to fit the Apex temperature probe. Also available with just two holes. (Style of screws may vary)