Doering's line of needle valves includes models for shut off and flow control applications. Products come in a wide array of sizes with housings in 1/8", 1/4" or 3/8" porting.

Specialty Mfg. Co is a manufacturer of a wide selection of valve products, including brass and plastic needle valves in a variety of sizes. The NV series are compact and offer a 3 turn adjustment in the needle. A 6.5 turn adjustment is also offered.