Motorcycle riders, if your forks are leaking oil, these seals will fix it! Specifically designed for Marzocchi 38mm diameter forks (common on many dirt bikes, dual-sports, and street bikes). Dimensions: 38mm inner diameter, 50mm outer diameter, 10.5mm thickness. Part number FOS015 from Pyramid Parts. Brand new in packaging, EAN 5060547930654. Leaking fork seals make your bike handle poorly and create a mess. Replacing them restores proper suspension action and prevents further damage. Whether you ride off-road, on street, or both, maintaining your forks is essential. These are replacement parts, not performance upgrades - they restore factory function. Installation requires some mechanical skill and special tools (seal driver). Keep your bike riding smoothly and safely. Don't ignore leaking forks - fix them with these quality seals and get back to enjoying the ride!