I have several Sparrow O-ring packs for sale, these are the recommended Viton O-rings in black, sizes #13 and #18, as recommended in the manual. The #18 can also be used on the Osprey's locking ring as well.
The size 13 is used on the inside of the core/baffle and measures 7/16" ID x 9/16" OD x 1/16"
The size 18 is used on the outside of the core/baffle and measures 3/4" ID x 7/8" OD x 1/16"
These packs will include 2x #13 and 2x #18 O-rings and will only cost $8.00 shipped, prefer to use PayPal sent as a gift, will ship out USPS first class.
If you buy multiple packs I will give a discount:
1 pack - $8 shipped
2 packs - $14 shipped
3 packs - $20 shipped
4 packs - $25 shipped
5 packs - $30 shipped
I only have enough in black for 15 packs. Please pm me with any inquires, thank you.