From Amazon
BWT LBC215V2 LIFF LIMEBEATER Compression Electrolytic Scale Conditioner, Chrome Finish
Wickes
LIFF Limebeater Compression Scale Inhibitor - 15mm | Chrome Finish | 150 x 35 x 35mm | 0.241kg
Travis Perkins
Liff 15mm Compression Lime Beater 2 Compact Electrolytic Inhib Lbc2-15V2 - Silver