The Rock Slide, a slightly shorter glass slide. Approximately 4.7 cm in total length, with an inner diameter of about 1.7 cm (there may be some slight variations). I haven't used it much, so I'm offering it to someone who can use it. There's some minor wear and tear, but it should be in good condition for normal use. Reference price: It seems to be 4280 yen at Sound House currently.