The OTC Injector Height Gauge Set, No. 5870, is designed to assist technicians with properly setting the injector body height to the injector follower for proper fuel injector timing. The 5870 is complete with seven height gauges ranging from 1.460" to 3.232" for use on Detroit Diesel Series 60, two-cycle Series 53, Series 71, Series 92, and DDEC IV engines.