The Quartz Banger Nail 10 Female 90 is a must for anyone that enjoys extracts. Not sure if this is the right nail for you? Here's what the catalog name means: Quartz: Quartz is more thermally shock resistant than borosilicate (Pyrex). By nature, the use of extracts is higher temp than non-extract (leaf) use and the nature of peoples behavior dictates that while your piece is made of boro, the nail part cannot be made of boro because most people simply BLAST the nail with the full flame of the torch instead of 'feathering' the flame to give the glass a chance to expand slower and not crack. Secondarily, some torches these days get hot enough to melt borosilicate to deformation temperature, and that's no good. Titanium, even type 2 Ti oxidizes and off gasses far more than Quartz, so, at this point, Quartz is the most demanded nail material. Here's a little Quartz Wiki Banger: This term is a bit of a mystery, however, after speaking with 5 different people, the common conception is that it refers to the cold strength of Quartz...you can bang it around more than a glass (boro) nail. Nail: A reference to the first extract appliances that were longer and thinner that looked like a screw or a nail. 14MM: refers to the size of the glass joint it will fit in. 10mm, 14mm and 19mm are most common. Female or Male: refers to whether the joint on the nail goes into the joint or on top of the joint. 90: the angle from the joint. Nails are comprised of a dish, a throat and a joint, all welded together to make a complete nail. A saucer style quartz nail typically has zero zero angle between the dish portion of the nail and the joint; the throat is straight, which requires your receiving joint to be vertical. A 45 refers to a 45 degree angle between the dish and the joint and is typical of most classic waterpipe styles. A 90 refers to a 90 degree angle between the dish and the joint and is typical of most classic rig style pipes. Domeless: Older 'skillet' style pipes provided poor downward airflow into the pipe, so, a dome was placed over the skillet, then, in later models, the dome was placed over the Titanium nail. These days, domes and Titanium nails are a thing of the past, but the lack of a dome has remained part of the description, hence, 'domeless' *** Made in China ***	