A. Compatibility: The spark plug protective cap is suitable for some general engines like 168F/170F/173F/188F/190F/192F. It can be used in generators, tillers, troweling machines, go - carts, etc., and also for low - power engines. B. Materials: The black spark plug cap is made of rubber material, which is not easily damaged and can be used for a relatively long time. C. Replacement part: It can replace old, damaged or cracked spark plug caps. D. Quality: Professionally manufactured, it has relatively high performance, good stability and a relatively long service life. E. Product size: The size of the spark plug protective cap is approximately 8.5 cm × 3.5 cm × 2.5 cm (3.35 inches × 1.38 inches × 0.98 inches). F. Specification description: - Material: Rubber - Product size: Approximately 8.5 cm × 3.5 cm × 2.5 cm (3.35 inches × 1.38 inches × 0.98 inches) G. Packaging content: 1 spark plug protective cap H. Precautions: Due to manual measurement, a slight error of 1 - 2 cm is allowed.