Donaldson Filtration Distributor for Mobile and static Applications. Get the right, high performance filters for all your engines and equipment from Alexis Filters - the UK's expert suppliers of high quality Donaldson filtration, exhaust and industrial filtration solutions. Choose Alexis, and you'll benefit from quality filters, responsive next day delivery and expert support and advice, designed to ensure you get the right products that will protect your machinery and provide real lonbg-term value.