45404066000 Chain Slider KTM 50sx SX-E5 2020>, Husqvarna TC50 EE 5

2020>, Gas Gas MC50 MC-E5 2021>

Chain Slider changed in 2020 on these bikes

Gennuine KTM Husqvarna GASGAS part

NB. If you have a GASGAS MC50 check whether it has the old or new chain slider, if your bike is a 2020 year bike.  There was a cross over with some of these bikes, most are the old style chain slider.