ALL SOLD****Four shift knobs #1- I believe is plastic, concentric circles, white and tan with a round metal disc on top, has a 1/4" crack on side and a little separation. Tapers from top down. All is solid. Measures 1 3/4" x 1 3/4" with a 5/16" non threaded opening. $30.00 SHIPPED #2-Looks to be NOS bakelite. Measures 2" x 1 3/16" with a 9/16" opening. $40.00 SHIPPED #3-Is a polished stone or granite, I sure it is modern but very nice. Tapers from top down. Measure 2" x 1 3/4" with a 1/2" threaded opening. $45.00 SHIPPED #4-Looks to be NOS bakelite. Measures 1 3/4" x 1 3/8". Tapers from top down. Has a threaded 9/16" opening. $40.00 SHIPPED You may need a threaded adaptor for your application. PAYPAL