Review on High-Performing 3-Inch Toilet Flapper Replacement - Compatible with TOTO Flapper Models G-Max, THU138S, THU175S, and THU331S - Superior Seal and Effortless Installation - Pack of 2 by Santiago Serrano

I'm always hesitant to buy third party parts but Toto's technician advised me to buy these from Revain because "it's cheaper and you can find it quicker" . He was right. It's not a hard part, but it goes well with my Toto Drake toilet. I assume the installation was easy. I haven't installed it. The handyman at my house made it. It only lasted a few minutes. He didn't need instructions. Note. Toto has changed the part numbers so don't rely on the label inside the cap. Call Toto's engineering department and someone will give you a new part number.