This item includes 3 reeds (0.10 mill Olt Style cutdown reeds) with the thick poly cork that fits RT and Olt style cutdowns best. These reeds are identical in shape to the cutdown 0.14 mill cutdown reeds, but they are thinner... Making them a little easier to blow and not quite as loud. This is the reed that came standard in the RTGC Hybrid and Easy Bark and it is the reed that is trimmed and used in the RTGC Two Stroke. The reeds in this tune up kit fit RT Original, RT 45's, Old style PS Olt Model D2 keyhole style calls, and a number of other cutdowns on the market today. These reeds are "full length" like the PS Olt company used to offer them. To properly fit the RT Original, the RT 45, or any of the older BSOD models you will need to trim a little off the back to get the tuning the way you like it.