Detech 13&rdquo; Ultimate Waterproof Coil for White's VX3 V3i, DFX, MXT Series, M6 and MX5 Metal Detector New and improved Black Version - Waterproof Size: 13" Configuration: DD Coil Weight: 480g / 1.06 Pounds Very stable operation Better Sensitivity More accurate target identification More stable ground and better overall field performance Maximum UV Protection Ribbed housing, specially designed for absorbing the mechanical shocks and vibrations Made of special polymer, strenghened with glass fibers, injection molded with a very high pressure