BSP three quarter inch threaded collar with 20 teeth x 57mm overall height and spline height of 12 mm x 7.6 mm spline dia. This product is suitable for Ottone Meloda 26-30-55 Devario Excel 3/4in Bath Brass Cartridge T20-32 Pair. 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.