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3 Inch Toilet Flapper, Compatible with Gerber Toilet Flapper 99-788, Toilet Tank Flush Valve 3 in. Rubber Stopper Replacement Kit, Easy-to-Install Toilet Bowl Seal Repair Parts, Blue (Pack of 2) - Amazon.com
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Toilet Flapper Replacement Kit for 99-827 Toilet Flap Parts Toilet Flapper Toilet Rubber Flapper and Chain Toilet Replacement Parts For Similar Models (Clear,2 Pieces) - Amazon.com
Gerber Plumbing Toilet Parts | Wholesale Plumbing Supply - St-Charles-Eureka-Pevely-Wentzville- St-Louis-Farmington
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2 Pack 3 Inch Toilet Flapper Replacement Parts Compatible with Gerber 99-788 / Lowe's AquaSource 1.28 GPF Toilets (98923, 312795, 352027, 395280, 12293) - Amazon.com
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