REI Garage offers the MSR Trekking Pole Maintenance Kit for $4.73. Choose in-store pickup to avoid the $5.99 shipping fee. That's $3 under our October mention and the lowest price we could find now by $8. It includes a long pole section brush, SureLock button hole brush, 2.5mm and 3mm hex keys, PackTowl drying cloth, and two large ferrules.