Genuine Lefroy Brooks Cartridge
 ½" flow control ceramic cartridge used for the on/off function in specific concealed shower mixer valves, particularly in the Godolphin and Classic ranges. It is an extended cartridge designed for certain installations. 
Product Details & Specifications
The PTC002 is the replacement part needed if a compatible shower is leaking or dripping from the spout, or if the flow control is no longer working correctly. 
Type: 1/2" flow control ceramic cartridge.
Material: Made of brass.
Operation: Clockwise close (anticlockwise to open) and quarter-turn operation.
Compatibility: Suitable for Godolphin (GD) and Black (BL) models, including the GD 8700.
Dimensions:
Total Length: Approximately 80-82.65mm.
Diameter: 21.17mm.
Spline Diameter: 7.5mm.
Teeth/Splines: 20.
O-rings: 1.