Set of 2 universal adaptors suitable for parts and accessories for STIGA and other pressure washers. These accessories support maximum water pressure of 35 bar/3.5 MPa and a maximum input water temperature of 50°C/122°F. The kit contains 1 adaptor with threaded connector ideal to use accessories which have a bayonet connection with a pistol with threaded female M22 connector; 1 adaptor for the use of accessories of the KAERCHER type on a STIGA pistol. This adaptor transforms parts and accessories with a different connector into a STIGA connector. The kit is compatible with all STIGA pressure washer models HPS 110, HPS 235 R, HPS 345 R, HPS 550 R and HPS 650 RG.