Streamlight Replacement Rubber Hardhat Strap (61003) Flexible, comfortable rubber helmet/hard hat strap for use with the Streamlight Trident, Septor, Argo, Argo HP and all other Streamlight headlamps. Ideal for firemen and anyone working in the industrial or construction industries. Specifications: - Compatibility: Fits all Streamlight Headlamps - Exterior Dimensions: 6 x 5 x 2