Triple check microfilter bags are sturdy and have three layers for high filtration For Windsor Karcher models S12, S15, SR12, SR15, SR18, VSP14, VSP18, XP12, XP15, XP18 upright vac Genuine Windsor Karcher filter bags with locking green clip-made in Germany Package contains 2 packs (8.600-050.0) - 10 bags per pack (20 bags) Filter bags for Windsor Karcher Sensor and Versamatic vacuums The Genuine Windsor Karcher triple check microfilter bags are 3-ply filter bags with locking green clip. Made in Germany each bag has 0.3 micro-filtration. The triple check microfilter bags are designed to fit models Sensor S12, S15, SR12, SR15, SR18, and Versamatic VSP14, VSP18, XP12, XP15, XP18 upright series. 8.600-050.0