Threaded Electrode G 1/2 Red Copper for EDM Sparking, No Flushing Hole Specifications: Thread Diameter: 18.8 mm; Finished Thread Size: G 1/2; Thread Pitch: 14 threads/25 mm; Thread Length: 40 mm; Electrode Length: 60 mm; 1 x Threaded Electrode Material: Excellent electrical and thermal conductivity, oxidation resistant I don't understand the details. Please, if you know about it ( ¨̮ )! Thank you for viewing this product from among many others ♡♡ #miimama shop is here ✨ ✂︎------------------✂︎ ＊Instant purchase welcome, silent purchase at midnight OK ◎ ＊Welcome to bulk purchase, feel free to comment ♡ ＊Free shipping! ＊Operation has not been confirmed. ・Please understand that the item is stored at home and will be shipped in simple packaging before purchasing (*ᴗˬᴗ)⁾⁾⁾ ・Please check the actual photos for the condition of the product♪ ※In order to sell at a slightly lower price, we may ship the item after taking it out of the box due to shipping costs. 1630