I uaws 4 inch in my coke machine ( and ran the single stripe of it from top across bottom and up the other side) to heat it up. works great as long as I don't leave the door open for long times. the odd part is out of the couple clutches I done I havea higher female to male ratio lol. but most places have it online. I prefer to get it on bean farm last time I order some. I not picking any up at a shows casue they were a lot higher 9 the one guy that had it was like 6 bucks a ft for 11 inch wide. ( I use thise on my tubs )