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Hi, I need a new fuse for my DC Duffer. Any users out there - would you know the fuse type? I did email retro-thermionic@outlook.com but haven't had a response yet. It is 20mm tall.

Item: DC Blocker Location:Glen Waverley Price: SOLD plus post if required Item Condition:very good Reason for selling: NLR Payment Method: Pickup - Cash, Paypal, COD Only Extra Info: Made by the legendary Mark Houston of SNA and Melb. Audio Club fame - hope he doesn't mind me using his description! All mains these days contains some levels of DC current. Most solid state amplifiers and preamp contain toroid transformers. Even a tiny amount of DC will strongly effect toroids and reduce thier ability to work to optimum. They will pass though noise on the mains instead of blocking it. The effective inductance of the Tranni is reduced. It can also cause some to hum or buzz. The DC Duffer blocks all DC from entering your hifi gear. The blocker also contains a ferrite choke on the mains lead to reduce RFI and a mains filter inside to block RFI/EMI. It is fuse to carry 900W and is a ABS enclosure for safety reasons. The blocker will also stop noise from switch mode power supplies getting into your gear and noise from you gear entering the rest of the house wiring. I have recently purchased a power conditioner board so no longer require. http://retro-thermionic.blogspot.com/2018/07/dc-duffer-black.html ELECTRICAL DISCLAIMER This product has not been manufactured by a qualified individual or company, therefore contains electrical circuits that do not necessarily comply with Australian Standards. I understand that as the seller, I may be liable to repercussions in the event of equipment failure. By advertising and selling this product, as the seller I also agree that I am solely liable, and the publisher of this website takes no responsibility for any injury or death resulting from, whether directly or indirectly, any accident that may happen as a result of the failure of the product being sold. If in doubt, seek the services of a qualified electrician to inspect the product to ensure it is safe for use.  Photos: