If it was a 40ft pole it would be called the SLX40

The exact length of this pole (no gooseneck or brush) is 11,705mm which is 38' 5" - allowing for a short plastic gooseneck and brush being used will give you an extra 160mm of extended length (6.4"), giving you a measurement of 11,865mm or
just over 38'11". If it is used with the shortest QuicK-LoQ carbon fibre gooseneck and brush this would add 190mm of extended length (7.5"), giving you a total measurement of 11,895mm or
39'¼". Therefore calling it the SLX39 seems to be the most accurate description of its length.
For sake of comparison (not by way of criticism) an Ionics' Glyder 40ft pole is 11m long when extended (with brush head) which is 36ft.
As most of you will know we have always tried to name our poles according to their actual length including a gooseneck and brush rather than the reach of the pole which many manufacturers still do. This name has always been in 'feet' reflecting our primary market of the UK. For an exact measurement we have always listed the exact extended length (without gooseneck & brush) in metres. With the new range we have continued this practice and we have tried to improve our naming accuracy.
We have started completely afresh with this brand new range which has allowed us to optimize all of the lengths of the new SLX range to provide best closed length to extended length ratio - This has been better facilitated by the new clamping system which closes down even more compactly making these clamps the most compact of any WFP available (despite having 15% increased clamping area).