A Minimum of [200$] is required before checking out.Current cart's total: $146.41 “Energy Transfer Demonstration Apparatus” has been added to your basket. Continue shopping Product Price SKU Quantity Subtotal Energy Transfer Apparatus Spring Unit Energy Transfer Apparatus Spring Unit quantity × $66.55 SKU: ESP59934 Subtotal: $66.55 Remove $66.55 ESP59934 Energy Transfer Apparatus Spring Unit quantity $66.55 Energy Transfer Demonstration Apparatus Energy Transfer Demonstration Apparatus quantity × $79.86 SKU: ESP59954 Subtotal: $79.86 Remove $79.86 ESP59954 Energy Transfer Demonstration Apparatus quantity $79.86 Coupon: Clear shopping cart Update cart Basket totals Subtotal $146.41 Total $146.41 Proceed to checkout Continue shopping