Every part number you need to check it
STARTECHWELD ST-45V43
A five-pack of gas lens bodies that publishes the collet series and the cup range it works with — which is how TIG consumables are actually identified.
TIG consumables are a stack, not a part: a collet body screws into the torch, a collet of a matching series grips the tungsten, and a ceramic cup of a matching family screws over the lot. Get one wrong and the stack does not seal, which shows up as a weld that goes grey and porous for no obvious reason.
This listing publishes the whole chain. The body is a 45V43, for 1/16 in tungsten, fitting TIG 9, 20 and 25 series torches, taking standard 13N series collets and 53N58 through 53N61S gas lens ceramic cups. Five in the pack. Nothing else on this shelf identifies itself that completely.
What it is, specifically, is a gas lens rather than a plain collet body — a layered mesh screen in the gas path that turns a turbulent swirl into a smooth column. That buys wider shielding coverage and the ability to extend the tungsten further out of the cup for a joint you cannot get close to, which is why TIG welders fit them to anything they care about. It also uses more argon at the same flow, and the listing does not say what the screen is made of or how fine it is, which is what decides how soon it clogs with spatter.
Availability
Read on the day this page was built: $22 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-07. The live price is at the top of the page.
The questions welders ask
What does a gas lens actually do?
It turns a turbulent gas stream into a laminar one. A plain collet body lets argon out around the tungsten in a swirl that mixes with air; a gas lens puts a layered mesh screen in the path, so the gas leaves as a smooth column. The practical results are a wider usable gas coverage, the ability to stick the tungsten further out for awkward joints, and a cleaner weld on stainless and aluminum. The cost is argon: a lens flows more gas to do it.
Why do the part numbers matter so much here?
Because TIG consumables are a system, not a part. A 45V43 body takes a specific collet series, and a specific family of ceramic cups screws onto it — get any one of the three wrong and the stack does not seal. This listing publishes all of them: 45V43, 1/16 in, 13N collets, 53N58 to 53N61S cups, torches 9, 20 and 25. That is the whole compatibility chain in five lines, and it is more than any other consumable listing on this shelf gives.
