You don't specify on your website what the current requirement of the bed heater is, son how can anyone tell whether it is compatible with their electronics?
If you are serious about selling quality parts, you will also specify the tolerance of the bed resistance, and the heating time from (say) 20C to 100C.
IMO it makes little sense to use a bed heater bigger than 200 x 200mm with 12V power anyway, as either the bed heater will be under powered, or it will most likely take more current than the printer electronics can provide.
If you are serious about selling quality parts, you will also specify the tolerance of the bed resistance, and the heating time from (say) 20C to 100C.
IMO it makes little sense to use a bed heater bigger than 200 x 200mm with 12V power anyway, as either the bed heater will be under powered, or it will most likely take more current than the printer electronics can provide.