If your gear is steel it is factory gear.
If it is aluminum square section or airfoil shaped it is (was) grove gear. It wasn't an option to order from Van's, you just bought a different set of gear from Grove. I think Grove stopped producing the airfoil shaped gear a few years ago but I thought the still made the square gear. Could be wrong though.
There is a new company producing the airfoil shaped gear. Somebody chime in here because the name escapes me.
If it is aluminum square section or airfoil shaped it is (was) grove gear. It wasn't an option to order from Van's, you just bought a different set of gear from Grove. I think Grove stopped producing the airfoil shaped gear a few years ago but I thought the still made the square gear. Could be wrong though.
There is a new company producing the airfoil shaped gear. Somebody chime in here because the name escapes me.