Detail: The arrays come with standard 1/4 inch diameter jacket plug compatible with most detox foot spa machines. Arrays normally can be used between 100-200 times before needing replaced. These arrays are well-made with a molded composite plastic exterior and top-grade stainless steel internal coils. Each array contains dual spiral-activating coils for superb ion production and comes with our 100% satisfaction guarantee. Clean the arrays by soaking in white vinegar for 10 minutes and air dry it to increase serve life. Package Contents As you choose. Ionic Detox Foot Bath Cleanse Spa, Ion Detox Array Kit (Lot). Standard connection, compatible with most ionic foot spa machines. These arrays are made with a double row of coils instead of a single row like cheaper ones on the market. Made of stainless steel for superior performance. Specifications: -material: stainless steel & ABS -color: black -weight:0.44lb each -size:2.75″ x 2.75″ x 3.9. Features Indicator lights show working state. Simple Design A stronger immune system response to illnesses and diseases And relief from: Muscle pain Joint pain Candida Arthritis Diabetes Low Energy Levels Allergies Sleeplessness Poor concentration Skin conditions such as eczema and psoriasis Chemical Toxicity Lupus CFS (Chronic Fatigue Syndrome) Fibromyalgia Gout Edema Arthritis Parasites Candida and more..