Extender Bars in conjunction with Scroll Rods allow you the versatility and convenience to size your frame to any project you desire.Extender Bar sets include 2 Extender Bars which are compatible with every size Scroll Rods.Length refers to actual measurement between Scroll Rod holes (distance between Scroll Rods).Actual length of any given Extender Bar is measurement plus 2.5cm - 1.3cm - example: 25cm Extender Bar = 28cm - 1.3cm total length.Constructed of Oak.This package contains (2) 30cm Extender Bars.Extender Bars are available additional sizes, each sold separately.Made in USA.