BSP half inch threaded collar with 20 teeth x 52mm height and spline height of 8 mm x 7.6 mm spline dia. This product is suitable for reginox elbe Orbit20 Mk2 V54ELE T20-30 Bank 29 1/2" B5455048711447 T20-36 B54VS02 8711 T20-16. Tap Magician are the UK experts in ceramic disc tap cartridges and leaky taps. We offer high quality fully compatible tap valve spares for most UK kitchen, basin, bath and shower mixers. Easily repair and doctor your leaking or dripping hot and cold taps. Traditional or ceramic valve type. We have experienced advisors available for any technical support you need help or advice with. We stock the spare parts for all of our valves for easy and cheap low cost future maintenance (ceramic disc internals and silicone seals and washers and o'rings). We offer a 12 month warranty on all of our products.