what parts do I need to buy

A landlord from California says:
hello
my name is Justin. I have the casemount where the handle came off the mount. I was planning to just change the case mount. Do I need to buy the window arms too?

Also, if i just change the case mount, can i still use the old window arms.

thank you
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Casey from SWISCO responded:

Hello,

Take a look and compare the specifications of our39-429 and 39-430 Roto operators to yours. If you need to replace the hinges as well, see our 36-048. Thanks for posting! 

39-541 : Roto Casement Track Slider
Roto Casement Track Slider
39-541
$4.29
VIEW >
39-429 : Roto Single Arm Operator, 9-1/2
Roto Single Arm Operator, 9-1/2"
39-429
$28.34
VIEW >
39-430 : Roto Single Arm Operator, 9-1/2
Roto Single Arm Operator, 9-1/2"
39-430
$28.34
VIEW >
36-048 : 2-Bar Hinge Set, 10
2-Bar Hinge Set, 10"
36-048
$17.46
VIEW >
39-232 :  Roto Folding Crank Handle, 11/32
Roto Folding Crank Handle, 11/32"
39-232
$10.80
VIEW >
Anatomy of a casement window
Anatomy of a casement window
VIDEO
WATCH >
How to Replace a 2-Bar Hinge Set on a Casement Window
How to Replace a 2-Bar Hinge Set on a Casement Window
VIDEO
WATCH >
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