This kit features everything you need to expand your dust collection hose network, and is ideal for cleaning up after stationary woodworking and power tool applications.

https://www.amazon.com/dp/B07SVPV9TN/ref=cm_sw_r_tw_dp_U_x_Jl0UEbJX882YQ

From Josh Cardenas: These are fittings for connecting up the dust collection system (required in order to use Air Cleaner).

$142 includes tax