View on Amazon. M MINGLE Pressure Washer Sand-Blaster Kit, Sandblasting Attachment, 1/4 Inch Quick Connect or Compatible Karcher Adapter, 2500 PSI. Fits most pressure washer which has 1/4'' quick connect at the end of gun. Also fit Karcher K series pressure washer, such as K2, K3, K4, K5, K6, K7. The karcher adapter …