Metcal precision te dispensing needles packs of 50 metcal 918050 te an 18 gauge dispensing needle tip from the metcal te series the needle tip consists of a stainless steel cannula with a double helix polypropylene hubthis premier quality dispensing needle is burr free with an electro polished cannula for unobstructed and consistent material flow metcal 918050 te precision te needle 18 gauge x 12 green pack of 50