2 PCS M8 Thread 4mm Inner Dia Aluminum Water Outlet for RC Model Product Name : Water Outlet;Thread Dia. : M8 Inner Dia. : 4mm/0.16";Hex Screw Nut Size : 10 x 10mm/0.4" x 0.4"(L*W) Total Size : 25 x 12mm /1" x 0.47"(L*Max.D);Material : Aluminum Color : Silver Tone;Net Weight : 7g Package Content : 2 x Water Outlet