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Installation of my Chamberlain B2401 Garage Door Opener.
Chamberlain B2401 opener: amzn.to/3PJxvpV
Chamberlain B4603T opener: amzn.to/3PJTgpA
Door Reinforcement: amzn.to/4czvUgn
8' Extension: amzn.to/3vBqmRR
White Lithium Grease: amzn.to/3PHAK1e