The Twins sets of valves come complete with 50mm connection valves and a 50mm pipe masking set. These valves are specially stocked to pair with the Terma Hex radiators, manufactured in the same colour to achieve an overall matching finish head to toe (or any radiator with 50mm pipe connections). Angled orientation and left sided (with the TRV head on the left hand side of the product and the body of the valve on the right side). The Sparkling Grey colour has a silk, smooth finish.