The Colt Bum Buddy is a large, reusable enema bulb that has a capacity of 15.5 ounces. It features an oversized silicone bulb that is easy to squeeze. The nozzle is made of silky, comfortable, no-seam TPR. This nozzle is easy to disassemble for filling and cleaning. The top pops off smoothly (it doesn't screw on). The tip is 5.5 inches long, with a diameter of one inch.