We typically have the "Borer" props in stock but if you check our website and it says these props are out of stock, do not despair!  We can drop ship one to you straight from the factory and you can be on your way!  The pitches approved via our STC are 41" to 44" (bolt kit is included in price) and the STC it is an additional $150.  A great performing propeller.   We might even have good used ones in stock!