The Top Line Perfect Pedal is the result of tinkering and modifying "cheap traditional" roller pedals over the years. While a cheap single bladed pedal will wiggle around in the pedal assembly, the Perfect Pedal will not. It's double arm construction fits the slot in the casting perfectly, and the extra arm lines the cable up with the tunnel tube properly. Due to the proper lineup, your cable will flex less, and last longer.
The pedal will work with all VW pedal assemblies, from oval window to Super Beetle models. It will accept both the early solid wire cable, and the later cable with dogleg end. Another popular option is to use the Top Line Maxx throttle cable (part number 16-0219) for super reliable operation