Method of tagged：
d: hot end diameter n: spray aluminum length HZ: heating part OL: carbon rod length CZ: cold end  OD: end diameter d/HZ/CZ/OL
ATTENTION： When place the order of High Temperature Dumbbell SiC Heater For Industrial Furnace, pleas mark the below specifications: Model, the length of hotzone, the length of coldzone, the space between the middle of two shank.