Check the listing for details. FEBTECH-Septic Tank Marker-3.5" x 7"-Pack of 4 Pcs + 1 Pc Hammer. Condition: New. Listed at 39.99 USD. MADE FROM CARBON STEELThe Stud and washer are made from CARBON STEEL, ensuring durability of the product for longer period of time.PACK OF 4 + 1 HAMMERThis pack provides you with : 4 PCS STUD, 4 PCS OF WASHER including 1 PC of HAMMERRIGHT SIZED STUD AND WASHERThe stud and washer are sized perfectly for easy and quick installation making it convinient for domestic use.IMPROVED VISIBILITY EVEN FROM DISTANCEThis ORANGE COLOURED Studs and Washer will help you to easily identify the boundary / marking clearly from a distance.EASILY DECTECTABLE BY MAGNETIC DETECTORThese studs are Detectable by Magnetic Detector, helping in saving your underground septic tank from being destroyed.EASY TO INSTALLStuds and Washers are easily installable by anyone making it an easy application with lasting benefit.