Grooved top bars are used mainly for plastic foundation, which just snaps into the frame. These do not have a wedge strip that breaks out, only 1 groove down the middle of the top bar.
Frame replacement parts are #1 grade.
#1 or Select grade frames are made using clear lumber and should have no knots. All of our frames are hand made for precise fitting pieces and the very best quality!
Picture order from top to bottom- Grooved Top Bar, Wedge Top Bar, Grooved Bottom Bar, Slotted Bottom Bar, Hive End Bar, Medium End Bar, Shallow End Bar