PLEASE HELP

[carlrod49]

please help to build (all details) to head DEEPERS (53X25 cm)
http://www.metaldetection.net/spanish/las_diferentes_cabezas.htm

[carlrod49]

help COIL

wanted to build a coil, (53x25 cm) for my metal detector, pulse induction,.(modelEEPERS) is necessary, the layout of the detector?. can explain me in detail: a) What type of copper wire?
B) mm thick? how many turns of wire?
THANK-YOU.