... electric heating source this Electrical Heat Treating Oven is for mattress springs, to ensure the high elasticity.Features:1) Load quantity: 20, ... x 6pcs, 1kW x 3pcs 5) Power: 380V, 50Hz 6) Inner dimensions: 1,420 x 1,100 x 1,160mm ... 7) Overall dimensions: 1,520 x 1,230 x 1,950mm 8) Total weight: 660kg Electrical Heat Treating Oven for mattress springs