Product Name: Silicon Mask Buckle Adjustment Buckle for Elastic Rope Stock: Stock Spring: With Spring Color: Black, White, etc Adjustable: Adjustable Element: Elastic Stopper for Mask's Earloop Usage: Ear Rope Stopper for Face Mask Feature: Soft and High Stretch Style: Cord Stopper Material: Plastic Trademark: NONE Transport Package: 3000PCS for Black and Other Colors Specification: hole diameter 1.5mm/4mm Origin: China Product Description Ready to ship Toggles / Cord Stoppers for Elastic Straps for MasksMaterial:rubberFeature:soft, high stretchOverall Size:6mm x 9mm for cylinder-shaped, oval shaped: 4mmx 9mmColor:black/white/transparencyBig hole:diameter 4mmSmall hole:diameter 1.5mm for oval shaped, 2mm for cylinder-shapedDesign:same as pictureApplication:Mask Earloop AdjusterWe Have Large Stock of accessories for the face masks: EAR ROPE STOPPER,NOSE WIRE , EARLOOP, ELASTIC BAND, CARBON FILTER, BREATHING VALVE , ETCIf you want to buy,Please contact us!