The R3 seatpost mount is designed specifically to be compatible with the R3 and Cervelo 2-hole seatposts. The kit includes one mount, two stainless steel bolts with nylon lock nuts
R3 Seatpost Mount (Cervelo)
Length: 2.6 in.(6.5 cm)
Width: 0.8 in. (2 cm)
Height: 2.3 in. (5.9 cm)
Weight: 35 grams
Material: PA66 +40% reinforced glass fiber