FR-4 Mug
FR-4 (or FR4) is a NEMA grade designation for glass-reinforced epoxy laminate material. FR-4 is a composite material composed of woven fiberglass cloth with an epoxy resin binder that is flame resistant (self-extinguishing). "FR" stands for "flame retardant", and does not denote that the material complies with the standard UL94V-0 unless testing is performed to UL 94, Vertical Flame testing in Section 8 at a compliant lab. The designation FR-4 was created by NEMA in 1968. FR-4 glass epoxy is a popular and versatile high-pressure thermoset plastic laminate grade with good strength to weight ratios. With near zero water absorption, FR-4 is most commonly used as an electrical insulator possessing considerable mechanical strength. The material is known to retain its high mechanical values and electrical insulating qualities in both dry and humid conditions. These attributes, along with good fabrication characteristics, lend utility to this grade for a wide variety of electrical and mechanical applications. Grade designations for glass epoxy laminates are: G-10, G-11, FR-4, FR-5 and FR-6. Of these, FR-4 is the grade most widely in use today. G-10, the predecessor to FR-4, lacks FR-4's self-extinguishing flammability characteristics. Hence, FR-4 has sincewhen? replaced G-10 in most applications.
The Urban Dictionary Mug
Customer Reviews
Gave i as a gift to my teacher she loved it
Sent this to a friend who may have originated the term, now part of slang lexicon. He was very pleased. The color is also perfect. Well done!
this mug summs up my entire life
BEST THING EVER I GOT THIS FOR MMY SON AND HE LOVED IT HE SAID THAT THE FINSTTERD GUY IS WHO HE LOVES AND IM FINE WITH THAT I HOPE HE GOT THE GIRL SOMETHING FOR VALENTINES DAY
Shipped very fast and very carefully! Perfect inside joke gift for a friend. ^_^
IT WAS AMAZING!!! BEST MUG EVERRRRR ITS A MUST BUYYYY!!! 🤑🤑🤑🤑🤑🤑🤑
very good for lean 😾😾💪
Damn drinking lean from this hits different. In a good way ofc
As usual very quick professional seller.
ENGAGED IN AN ACT OF COPULATION WITH MY FEMALE PROGENITOR INSIDE THIS MUG 11/10 WOULD ADVISE YOU TO PURCHASE IT
I SHIT IN THIS MUG SO MANY TIMES. Very cool
I literally broke it 10 minutes after opening the package while showing it off. Now my bussy mug is held together with super glue
I use this mug for my lean. Ironic shit am I right
Hi Cool mug! Really great and mad me lol when I saw the definition! 🤣
I would eat this mug, no hesitation
Hell yeah My definition as merch. Hell yeah
So dope.
Its insane
We're no strangers to love You know the rules and so do I A full commitment's what I'm thinking of You wouldn't get this from any other guy I just wanna tell you how I'm feeling Gotta make you understand Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you We've known each other for so long Your heart's been aching but you're too shy to say it Inside we both know what's been going on We know the game and we're gonna play it And if you ask me how I'm feeling Don't tell me you're too blind to see Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you Never gonna give, never gonna give (Give you up) We've known each other for so long Your heart's been aching but you're too shy to say it Inside we both know what's been going on We know the game and we're gonna play it I just wanna tell you how I'm feeling Gotta make you understand Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye
Just as expected, high quality