Tsukasa Aoi Acme HoleThe inner construction of Acme Hole Tsukasa Aoi is a dual layer design. Dual layer design is where the outside of the masturbator is made from a soft material while the inside is lined with a harder more stimulating material. This made it possible to have a nice and soft tactile feel when holding the masturbator while the inside is more stimulating due to the second material. The tunnel and texture of Acme Hole Tsukasa Aoi can be separated into 5