KPIJCI and Astec Mobile Screens offers a full line of KolbergPioneer, Inc (541) Johnson Crushers International Pioneer Jaw Crusher Plants. ft4240 ft4250 SpecificationS beFRAPready. ft4240 ft4250 SpecificationS The track mounted FT4240 and FT4250 Impact Crusher. The FT4250 provides a feed opening of 42" x 50", and the FT4240