Made in China Dimensions: Piezo sensor part L50mm x W3mm x H3mm Cable part: Plug φ2.5mm, covered part under φ3mm This is a piezo pickup designed for ukuleles and cigar box guitars, to be installed in the saddle. It can be installed in a bridge with a saddle groove width of 3mm and a through-hole of φ3mm. A preamp is not included. Please prepare one yourself if needed. Operation has been confirmed. *This item cannot be installed unless you can perform various measurements and make judgments yourself. If you need this kind of support, we recommend that you leave everything to a musical instrument store. Shipped via Yu-Packet Post Mini. If you purchase this item together with other items that can be shipped together, we will discount the shipping cost.