High performance valve stem seals for all 7mm valves made from Viton. This valve stem seals offer the following advantages: High-temperature strength Improved sliding Higher-life When using new valves also the guides must be replaced! Price for one seal. Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com