Scale Aircraft Conversions is an aftermarket company that makes replacement white metal landing gear. According to their website they try to fix any inaccuracies in kit parts or to provide additional support due to the weight of the kit. They provide replacement landing gear for scales from 1/24th to 1/144th scale.
The pieces included in this set are the two main landing (MLG), two MLG retraction struts, nose gear, nose gear retraction struts, and the nose gear door linkage.