M25 double compression exd cable gland has hole size in 25mm, it's the same size with G3/4 in inch, it's made by brass and ss stainless steel material.
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M25 Double Compression Cable Gland With G3/4 Size in Inches
Cable gland, M25, 10-14mm, brass, IP68 @ Morek
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Explosion-Proof Double Compression Armored Cable Gland - China Cable Gland, Exprosion Cable Gland
Double Compression Cable Gland for Armoured Cable M40*1.5 - China Ex-Proof Cable Gland, Ss Cable Gland
Explosion-Proof Double Compression Armored Cable Gland - China Cable Gland, Exprosion Cable Gland
Double Compression Cable Gland for Armoured Cable NPT1 1/4 - China Cable Gland, Ss Cable Gland
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Double Compression Nickel Plated Brass Cable Gland NPT1' - China Ex-Proof Cable Gland, Cable Gland