17 viên bi trong bao quy đầu

• 00:04
• 00:28
• 00:53
• 01:17
• 01:41
• 02:05
• 02:29
• 02:53
• 03:17
• 03:41

Each is 13mm diameter; could do with some more. Four minutes length

• 841
• 04:01