Spare inserts for your Ultralock back rest. Come as a pair.
 
34 - 37mm - 12mm Insert
37 - 40mm - 13mm
40 - 43mm - 14mm
43 - 46mm - 15mm
46 - 49mm - 16mm
49 - 53mm - 17mm
53 - 56mm - 18mm
56 - 59mm - 19mm
59 - 62mm - 20mm
62 - 65mm - 21mm
65 - 68mm - 22mm
68 - 72mm - 23mm
72 - 75mm - 24mm
75 - 78mm - 25mm