These sets are comprised of:

PET -67 SWB 911 Fig 8/12-00, #16 644.803.121.00 Retaining pin (Collar) Qty: 2
Material: Aluminum, 6061
Finish: Anodized, Type II, Clear
Weight: 23.21 grams

The fasteners are all stainless steel:
PET -67 SWB 911 Fig 8/12-00, #17 900.142.002.01 Lock ring, M08 DIN 7980 Qty: 2
PET -67 SWB 911 Fig 8/12-00, #18 900.142.004.01 Spring ring, M12 DIN 7980 bost. Qty: 2
PET -67 SWB 911 Fig 8/12-00, #19 900.119.007.02 Pan-head screw, M08x45 DIN 6912 Qty: 2

The price is $40.28 per set.
USPS flat rate shipping in the US is $5.25