Used for heat treatment of mattress springs with electric heating source this Electrical Heat Treating Oven is for mattress springs, to ensure the high elasticity. Features:1) Load quantity: 20,000 - 22,000pcs 2) Heat-treatment time: 2 hours (first) 3) Heat-treatment time: 1.5 hours (attacca) 4) Heating tubes: 2kW x 6pcs, 1kW x 3pcs 5) Power: 380V, 50Hz 6) Inner dimensions: 1,420 x 1,100 x 1, ...