Standard slide rails are manufactured with a hole each end, so as to fit over the spike of a tent pole, slide rails can also be made with a plain or threaded spike one end. They may also have a plate fitted on to one end. The standard maximum lengths are: -
>> 91cm - 2Pce
>> 121cm - 2Pce
>> 152cm - 2Pce
>> 182cm - 2Pce
>> 213cm - 2Pce
>> 243cm - 2Pce
>> 274cm - 2Pce or 3Pce.

The following lengths are also called ridge rails as well as slide rails and are manufactured in round or square tube;

>> 305cm - 2Pce or 3Pce
>> 335cm - 3Pce
>> 365cm - 3Pce
>> 395cm - 3Pce
>> 457cm - 3Pce
>> 548cm - 4Pce.