Includes (1) Coupler 1/4" Female NPT, (1) Plug 1/4" Male NPT, (1) Plug 1/4" Female NPT, and (1) Coupling 1/4" Male NPT. 4 piece 1/4" Series Industrial Style Includes 2 couplers, 1/4" Female NPT & 1/4" Male NPT Includes 2 Plugs, 1/4" Male NPT & 1/4" Female NPT. WARNING: This product can expose you to chemicals i