Continue shopping “4-400A PL-4-400A ELECTRON TUBE VALVE PENTA LABS USA” has been added to your cart. Product Price Quantity Subtotal × 4-400A PL-4-400A ELECTRON TUBE VALVE PENTA LABS USA $263.40 4-400A PL-4-400A ELECTRON TUBE VALVE PENTA LABS USA quantity $263.40 Coupon: Apply coupon Update cart Cart totals Subtotal $263.40 Total $263.40 Proceed to checkout