Princeton Tec - 1" Headlamp Strap - Black - HL-501. Need some new straps? This Genuine Princeton Tec cloth-elastic headlamp strap is the perfect replacement for your EOS, Quad, Vizz, Fuel, Sync or similar headlamps which use a 1" width strap. This strap is not compatible with our Bot, Byte, or Remix Rechargeable headlamps.. Features:. Water Resistant: IPX4. Color: Black. WARNING: This product can expose you to chemicals including BISPHENOL A (BPA) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.