The triplet design is the simplest to give the required number of degrees of freedom to allow the lens designer to overcome all Seidel aberrations

Construction: Lightweight Portable Design

Capacity: 24 Individual Gem Jars

Keep the unit level while lifting it from the water

Cobra Crusher - Portable Rock Crusher for Sampling Gold Ore Garrett Pro Pointer AT The triplet design is theCobra Crusher is great for sampling gold bearing rocks in the field! Weighs only about 10 pounds. Grinding chamber: 7. 5 inches x 3. 5" wide x 9" tall including feed tube. Straight feed tube makes it easier to feed rocks into it and much easier to pour out the pulverized material. All steel construction with chain hammers. The Cobra Crusher works by attaching to a standard Angle Grinders (NOT included). Cobra portable rock crusher will quickly grind