This heavy-duty engine oil filler cap is specifically designed for ISUZU NPR, NQR, NRR, and NPR-HD models equipped with 4HE1 4.8L, 4JJ1 3.0L, or 4HK1 5.2L engines from 1998-2024. The cap features a durable black construction with a threaded base for secure installation and a textured grip pattern on top for easy removal and tightening. Its robust design helps maintain proper engine oil containment while allowing convenient access for oil checks and changes. The scalloped edge design provides enhanced grip strength even in challenging conditions. This replacement cap is precision-engineered to match original specifications for perfect fitment and reliable performance in maintaining your ISUZU commercial vehicle's engine oil system.