SilencerCo's O-Ring Pack includes essential replacement O-rings for the Delta Stormproof suppressor. These O-rings are crucial for maintaining optimal sound suppression by containing blast and debris, thereby ensuring that the suppressor operates quietly and cleanly.Key FeaturesIncluded O-Rings: The pack contains 4 O-rings suitable for various SilencerCo suppressor models.Thread Pattern: Compatible with a 1/2-28 thread pattern for easy installation.Model Compatibility: Designed for use with the SilencerCo Sparrow, Warlock II, and Spectre II suppressors.