The Black Collection is a series of 4 round and curved Bipolar electrodes, ranging from Small to XL. Each electrode is based on the popular Bobble but is larger in every dimension with a luxurious satin finish. The smooth spherical tip allows for gentle insertion, while the double waist design helps in secure placement. This means it can be inserted up to the black insulation, focusing on the area around the anal or vaginal opening. With further insertion up to the second waist, the sensations become more intense, touching areas that are not easily reached.