Holmes One piece spring p336
ALL SPRINGS MUST SHIP UPS GROUND DUE TO WEIGHT.
Holmes P336C is a heavy duty commercial spring used for airport hanger doors or really heavy wood doors.
length over coils is 36"
outside diameter is 2"
"C" plug or end cap
Wire diameter and guage is .244 and 3"
initial tension is 165 - 185
max allowable stretch is 24.25"