[OE Part Number] 2pcs chainsaw decompressor rubber caps with OEM part number 1122 084 1405 engineered to match original sealing specifications. [Compatibility] Compatible with STIHL MS660, 066 chainsaw models that require these decompressor valve rubber caps. [Functionality] Designed to protect the decompression valve assembly by sealing and cushioning the valve mechanism, helping maintain proper engine compression and performance. [Material] Made from durable rubber material that resists wear, oil, and environmental exposure for reliable long-lasting performance. [Easy Installation] Standard rubber cap design allows straightforward installation over the decompression valve housing for quick replacement during maintenance., Manufacturer: EMSea