This spare propeller is for Cruise 2.0 and 4.0 Remote models, as well as Cruise Tiller models with serial numbers greater than 5000. The variable-pitch-variable-camber (VPVC) propeller has slower speed, lower efficiency and higher thrust characteristics. It was developed especially for the torque characteristic and performance range of Torqeedo motors. Made of impact-resistant glass-fiber reinforced PBT (polybutylene terephthalate), it comes complete with nuts, disc springs and shear pin. The shear pin for this model 1915 propeller measures 4mm x 40mm (approximately 3/16" x 1-5/8").