1.B2022AW,B2023AW B2024AW closers, which can be installed in the door
frame,
2.They have transfer speed valve each from head to foot,left/right-hand
all is suitable.
3.B2022AW,B2023AW B2024AW,The ones that has closing and latching two
sections functions.
4.B2022AW,B2023AW A2024AW door closers are the slippery rail type
which are installed,and stopped in the slippery rail.
5.Door device , stopping the angle on the doorcan be regulated at
will.