Optiline 90555 Ball Head ⌀ 25 mm Ram to Duolock Adapter
S$22.60
or 3 installments of S$7.53 with 
or 3 installments of S$7.53 with
Adapter for non- Optiline holders
The rubberised ball head adheres perfectly to any fastening system that uses a 25 mm ball such as RAM® mounts.