UPPER SPRING ANTIVIBRANT COMPATIBLE WITH: MOTORSAWS MODELS: GL 4500 GL4500 GL 5200 GL5200 ASIA - CHINA - GOOD LUCK - LEA - SANDRIGARDEN - SWM - MTD 017771 Original part number: ALSO COMPATIBLE WITH: ZENOAH- KOMATSU- RED MAX MOTOSAW MODELS: G 455AVS G 500 original code: Z2881-35110 ALSO COMPATIBLE WITH: ZOMAX MOTOSAW MODELS: ZM 4610 ZM 4680 ZM 5200 ZM 5410 original code: