Precision-made washers for a secure fit Material: C.N.A.F. (Compressed Non-Asbestos Fibre) Actual Dimensions: 57.4mm (outer diameter) x 47.5mm (inner diameter) x 1.6mm (thickness) Suitable for 58mm miner’s lamp glass Durable, heat-resistant, and designed for long-lasting performance Compatible with ECCLES Protector Type 6 / SL and similar 58mm miners’ lamps.
