04 ($14.01/Count) FREE Shipping. Usually ships within 6 to 10 days. FSA or HSA eligible. Drive Replacement Wheelchair Parts (ALL PARTS SOLD SEPARATELY) Parts for TR16, TR18, TR20 - Poly-Fly Wheelchair/Flyweight Transport Chair Combo - 35. Seat Rail Guide - 1 Each. 3.8 out of 5 stars. 20. $20.38.