New ALM CH072 | Chainsaw Chain 45cm | 18 Inchs | 72 Drive Link Suitable for the following Chainsaws: MAC 20X POWER Mac 542E 545 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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