Continue shopping “4B31 RK-4B31 ELECTRON VACUUM TUBE VALVE RAYTHEON” has been added to your cart. Product Price Quantity Subtotal × 4B31 RK-4B31 ELECTRON VACUUM TUBE VALVE RAYTHEON $32.72 4B31 RK-4B31 ELECTRON VACUUM TUBE VALVE RAYTHEON quantity $32.72 Coupon: Apply coupon Update cart Cart totals Subtotal $32.72 Total $32.72 Proceed to checkout