Crystal Jellies Anal Kit Clear. The Crystal Jellies Anal Initiation Kit allows beginners to ease into backdoor play while enjoying each stage of intensity and fullness. Three classic plugs in smooth, body safe material sized at one inch intervals offer progressive levels of sensation, while flared bases and a firm yet flexible feel ensure safe and versatile fun. Experienced backdoor enthusiasts can also enjoy this set as the warm up for a night of more extreme intimate exploration. Features: three sizes for gradual training. Flared bases for safe use. 3 inches, 4 inches, and 5 inches insertable lengths. Soft, pliable material. Phthalate free, body safe. Specification small plug 3 inches by .8 inch. Medium plug 4 inches by 1.1 inches. Large plug 5 inches by 1.5 inches. Material PVC. Proudly, made in America.