Mansfield 500 Series Stem 123-0095 16" Overall Length Stem MPP6002 and is the locking lid

and is the locking lid that Fits any Alto tank

For Tanks 123

Seal For Older Style Mansfield Flush Valves that have not had the flush valve replaced with the newer red seal flush valve

It also comes with the nut to hold it onto the tank

The 400A offers quick refill rates

Mansfield 500 Series Stem 123-0095 16" Overall Length Stem MPP6002 and is the locking lidThis Stem Measures 16 Inches Long And Is The Replacement Stem For A 500 Series Faucet With 12 Inch frost protection. Stem comes with the packing washers for left, and right hand thread packing nuts. This stem does not come with the packing nut. The stem is made of copper and the handle screw will cut threads in it when installed. Please verify the model and length of your stem to save time and money.