New ALM CH072 | Chainsaw Chain 45cm | 18 Inchs | 72 Drive Link Suitable for the following Chainsaws: CSP 4016 4518 4520 HCS 4545 4446 The Drive links are the teeth that run along the inside of your chain bar Please count your drive links carefully Picture is for Illustration only This is an 'ALM' Product and was manufactured as a replacement part for the models listed above**.
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