Air filters protect the engine of your lawnmower from dirt. To protect your lawn mower's engine from long-term contamination, it is important to clean and replace the air filter regularly. This is the only way to maintain the performance of your lawn mower. The high quality air filter is made of paper. Paper air filters should be replaced when dirt cannot be removed from the pleats during cleaning. The foam air filter is made of high quality foam. Foam filters should be replaced when cleaning with a mild detergent is no longer effective. To ensure compatibility, please check if your lawnmower or lawn robot is listed under Replaces Accessories following original products and/or Suitable for the following models. - Not original product - high quality and compatible branded accessories. Contents of the Delivery: - 1 x Paper filter - 1 x Foam filter Technical data: - Dimensions: 14.5 x 8.5 x 2.8 cm - Colour: orange, black Suitable for the following models: - Viking MB2RT, MB4R Replaces