What we supply are specially designed to drive the standard 38mm roller blind aluminium tube. Please send an enquiry form for the other sizes exceeding 38mm, we may be able to custom make a special design drive wheel and crown for you, however an additional fee will have to be paid. Remote controls need to be purchased separately. Generally, you will only need to buy one 15CH remote control to be able to control 15 motorised curtains and roller blinds separately.