BP7FS NGK Spark Plugs. This NGK spark plug features a nickel middle electrode and one earthed electrode, with no interference suppression and a taper gasket seat. It has a M14 x 1.25 thread size and requires a 16 mm spanner size, with a thread length of 11.2 mm and a spark position of 3.0 mm. The spark plug also comes with a fixed SAE connector. NGK is a leading brand in the UK spark plug market, known for its quality and technical excellence. This listing is for one unit.