Karcher Universal Soft Bristle Wash Brush Attachment Accessory for Electric and Gas Power Pressure Washers, 3000 PSI Rating The Karcher Promise: Cleaner. Quicker Extra soft synthetic bristles for gentle surfaces and applications 1/4-inch Quick Connection Fits Karcher residential gas & electric pressure washers and most brands residential pressure washers The Karcher Universal Rotating Wash Brush Kit have a 3,000 PSI & 4.00 GPM rating Includes adaptors for Karcher bayonet and threaded connections