The KQ2L08-01S is a push-to-connect fitting made by SMC Corporation, a global leader in the engineering, manufacturing, and distribution of pneumatic and fluid control products. This particular model is a one-way flow check valve fitting with a tubular body. It is designed for connection to either air or gas lines and comes with a metal core for added strength. It is also available in various sizes (8, 10, 12, and 15 mm) and connection types (NPT, BSPT, and metric). The KQ2L08-01S provides a secure and reliable connection for a range of applications.