NAPA Pair of Rear Shock Absorbers for Vauxhall Astra CDTi A20DTH 2.0 (9/09-9/15) Posted on December 5, 2023 by admin 2 x NSA1290 – NAPA Shock Absorber. Shock Absorber Mounting Type: Bottom Eye. Shock Absorber Type: Gas Pressure. What this Set Contains TOP QUALITY PRODUCTS.