MATERIAL: Soft and comfortable Silicon. Made of a durable, long lasting, hypoallergenic, medical grade polymer. COMPATIBILITY: Replacement Earmould Earbuds for use with most Coil Tube Audio Kits, either Left or Right Ear. Work for transparent tube type earphone , such as HYS TC-801,TC-617-1,TC-617-1N Earpiece. SIZE & PACKING INCLUDES: Large; 3 Pairs-Large,(Coil tube NOT included). The image is referenced to receive the earmold color as the standard.